Limerence is a state of mind which results from a romantic attraction
 to another person and typically includes obsessive thoughts and 
fantasies and a desire to form or maintain a relationship with the 
object of love and have one's feelings reciprocated.
Origin and meaning of the term
Psychologist Dorothy Tennov coined the term "limerence" for her 1979 book, Love and Limerence:  The Experience of Being in Love,
 to describe a concept that had grown out of her work in the mid-1960s, 
when she interviewed over 500 people on the topic of love.
Limerence, which is not exclusively sexual, has been defined in 
terms of its potentially inspirational effects and in relation to attachment theory.
 It has been described as being "an involuntary potentially inspiring 
state of adoration and attachment to a limerent object (LO) involving intrusive and obsessive thoughts, feelings and behaviors from euphoria to despair, contingent on perceived emotional reciprocation".
Attachment theory emphasizes that "many of the most intense emotions arise during the formation, the maintenance, the disruption, and the renewal of attachment relationships".
 It has been suggested that "the state of limerence is the conscious 
experience of sexual incentive motivation" during attachment formation, 
"a kind of subjective experience of sexual incentive motivation" during the "intensive ... pair-forming stage" of human affectionate bonding.
Characteristics
The concept of 'limerence' "provides a particular carving up of the semantic domain of love", and represents an attempt at a scientific study of the nature of love. Limerence is considered as a cognitive
 and emotional state of being emotionally attached to or even obsessed 
with another person, and is typically experienced involuntarily and 
characterized by a strong desire for reciprocation of one's feelings—a 
near-obsessive form of romantic love. For Tennov, "sexual attraction is an essential component of limerence ... the limerent is a potential sex partner".
Limerence is sometimes also interpreted as infatuation,
 or what is colloquially known as a "crush".  However, in common speech,
 infatuation includes aspects of immaturity and extrapolation from 
insufficient information, and is usually short-lived.  Tennov notes how 
limerence "may dissolve soon after its initiation, as in an early 
teenage buzz-centered crush", but she is more concerned with the point when "limerent bonds are characterized by 'entropy' crystallization as described by Stendhal in his 1821 treatise On Love,
 where a new love infatuation perceptually begins to transform ... [and]
 attractive characteristics are exaggerated and unattractive 
characteristics are given little or no attention ... [creating] a 
'limerent object'". 
According to Tennov, there are at least two types of love: 
limerence, which she describes as, among other things, "loving 
attachment", and "loving affection", the bond that exists between an 
individual and their parents and children.
 She notes that one form may evolve into the other: "Those whose 
limerence was replaced by affectional bonding with the same partner 
might say ... 'We were very much in love when we married; today we love 
each other very much'". The distinction is comparable to that drawn by ethologists "between the pair-forming and pair-maintaining functions of sexual activity",
 just as "the attachment of the attachment theorists is very similar to 
the emotional reciprocation longed for in Tennov's limerence, and each 
is linked to sexuality".
Limerence is characterized by intrusive thinking
 and pronounced sensitivity to external events that reflect the 
disposition of the limerent object towards the individual. It can be 
experienced as intense joy or as extreme despair, depending on whether the feelings are reciprocated. Basically, it is the state of being completely carried away by unreasoned passion or love, even to the point of addictive-type
 behavior. Usually, one is inspired with an intense passion or 
admiration for someone. Limerence can be difficult to understand for 
those who have never experienced it, and it is thus often dismissed by 
non-limerents as ridiculous fantasy or a construct of romantic fiction.
Tennov differentiates between limerence and other emotions by asserting that love
 involves concern for the other person's welfare and feeling. While 
limerence does not require it, those concerns may certainly be 
incorporated. Affection
 and fondness exist only as a disposition towards another person, 
irrespective of whether those feelings are reciprocated, whereas 
limerence deeply desires reciprocation, but it remains unaltered whether
 or not it is returned. Physical contact with the object is neither 
essential nor sufficient to an individual experiencing limerence, unlike
 with one experiencing sexual attraction.  Where early, unhealthy attachment patterns or trauma
 influence limerence, the limerent object may be construed as an 
idealization of the figure or figures involved in the original unhealthy
 attachment or trauma. Lack of reciprocation may in such instances serve
 to reinforce lessons learned in earlier, unhealthy bonding experiences,
 and hence strengthen the limerence.
Components
Limerence involves intrusive thinking about the limerent object.
 Other characteristics include acute longing for reciprocation, fear of 
rejection, and unsettling shyness in the limerent object's presence. In 
cases of unrequited limerence, transient relief may be found by vividly 
imagining reciprocation from the limerent object. Tennov suggests that 
feelings of limerence can be intensified through adversity, obstacles, 
or distance—'Intensification through Adversity'.
 A limerent person may have acute sensitivity to any act, thought, or 
condition that can be interpreted favorably. This may include a tendency
 to devise, fabricate, or invent "reasonable" explanations for why 
neutral actions are a sign of hidden passion in the limerent object. 
A person experiencing limerence has a general intensity of 
feeling that leaves other concerns in the background. In their thoughts,
 such a person tends to emphasize what is admirable in the limerent 
object and to avoid any negative or problematic attributes.
Intrusive thinking and fantasy
During
 the height of limerence, thoughts of the limerent object (or person) 
are at once persistent, involuntary and intrusive. Such 'intrusive 
thoughts about the LO ... appear to be genetically driven':
 indeed, limerence is first and foremost a condition of cognitive 
obsession. This may be caused by low serotonin levels in the brain, 
comparable to those of people with obsessive–compulsive disorder.
 All events, associations, stimuli, and experiences return thoughts to 
the limerent object with unnerving consistency, while conversely the 
constant thoughts about the limerent object define all other 
experiences. If a certain thought has no previous connection with the 
limerent object, immediately one is made. Limerent fantasy is 
unsatisfactory unless rooted in reality,
 because the fantasizer may want the fantasy to seem realistic and 
somewhat possible.  At their most severe, intrusive limerent thoughts 
can occupy an individual's waking hours completely, resulting—like 
severe addiction—in significant or complete disruption of the limerent's
 normal interests and activities, including work and family.  For serial
 limerents, this can result in debilitating, lifelong underachievement 
in school, work, and family life.  Comparisons
 made between limerence and substance addiction may draw attention to 
the constant, free availability of the limerent's "drug of choice".
Fantasies that are concerned with far-fetched ideas are usually dropped by the fantasizer.
 Sometimes fantasizing is retrospective: actual events are replayed from
 memory with great vividness. This form predominates when what is viewed
 as evidence of possible reciprocation can be re-experienced (a kind of 
selective or revisionist history). Otherwise, the long fantasy is 
anticipatory; it begins in the everyday world and climaxes at the 
attainment of the limerent goal. A limerent fantasy can also involve an 
unusual, often tragic, event.
The long fantasies form bridges between the limerent's ordinary 
life and that intensely desired ecstatic moment. The duration and 
complexity of a fantasy depend on the availability of time and freedom 
from distractions. The bliss of the imagined moment of consummation is 
greater when events imagined to precede it are possible (though they 
often represent grave departures from the probable). Not always is it 
entirely pleasant, and when rejection seems likely the thoughts focus on
 despair, sometimes to the point of suicide.
 The pleasantness or unpleasantness of the state seems almost unrelated 
to the intensity of the reaction. Although the direction of feeling, 
i.e. happy versus unhappy, shifts rapidly, with 'dramatic surges of 
buoyancy and despair',
 the intensity of intrusive and involuntary thinking alters less 
rapidly, and only in response to an accumulation of experiences with the
 particular limerent object. 
Fantasies are occasionally dreamed by the one experiencing 
limerence. Dreams give out strong emotion and happiness when 
experienced, but often end with despair when the subject awakens. Dreams
 can reawaken strong feelings toward the limerent object after the 
feelings have declined.
Fear of rejection
Along
 with an emphasis on the perceived exceptional qualities, and devotion 
to them, there is abundant doubt that the feelings are reciprocated: rejection.
 Considerable self-doubt is encountered, leading to "personal 
incapacitation expressed through unsettling timidity in the presence of 
the person", something which causes misery and galvanizes desire.
In most cases, what destroys limerence is a suitably long period of time without reciprocation.
 Although it appears that limerence advances with adversity, personal 
discomfort may foul it.  This discomfort results from a fear of the 
limerent object's opinions.
Hope
Limerence 
develops and is sustained when there is a certain balance of hope and 
uncertainty. The basis for limerent hope is not in objective reality but
 in reality as it is perceived. The inclination is to sift through 
nuances of speech and subtleties of behavior for evidence of limerent hope. "Lovers, of course, are notoriously frantic epistemologists, second only to paranoiacs (and analysts) as readers of signs and wonders."
 "Little things" are noticed and endlessly analyzed for meaning. Such 
excessive concern over trivia may not be entirely unfounded, however, as
 body language can indicate reciprocated feeling. What the limerent 
object said and did is recalled with vividness. Alternative meanings for
 the behaviors recalled are sought. Each word and gesture is permanently
 available for review, especially those interpreted as evidence in favor
 of reciprocated feeling. When objects, people, places or situations are
 encountered with the limerent object, they are vividly remembered, 
especially if the limerent object  interacted with them in some way. 
The belief that the limerent object does not and will not 
reciprocate can only be reached with great difficulty. Limerence can be 
carried quite far before acknowledgment of rejection is genuine, 
especially if it has not been addressed openly by the limerent object.
Effects
Physical effects
The physiological correlations of intense limerence can include seizure-like trembling, pallor, flushing, heart palpitations, pupil dilation and general weakness. Awkwardness, stuttering, shyness, and confusion predominate at the behavioral level. Less common effects include insomnia, loss of appetite,  and passing out.
If there is extensive anxiety,
 incorrect behaviour may torpedo the relationship, which may cause 
physical responses to manifest intensely. Some people acutely feel these
 effects either immediately or following contact with the limerent 
object.  Blended is dire ecstasy or keen despair, depending on the turn 
of events. 
The sensitivity that stems from fear of rejection can darken limerent objects' perceived body language. Conflicted signs of desire
 may be emitted that confuse judgment.  Often the limerent object is 
currently involved with another or is in some other way unavailable.
A condition of sustained alertness, a heightening of awareness 
and an enormous fund of energy to deploy in pursuit of the limerent aim 
is developed. The sensation of limerence is felt in the midpoint of the 
chest, bottom of the throat, guts, or in some cases in the abdominal 
region. This can be interpreted as ecstasy at times of mutuality, but its presence is most noticeable during despair at times of rejection.
Psychological effects
Sufferers
 complain of abandonment, despair, and diabolically humiliating 
disappointment. A sense of paralyzing ambiguity predominates, punctuated
 by pining. The fact of intermittent or nonreciprocal response lends to 
labile vacillation. This limbo is the threshold for mental prostration.
Sexuality
Awareness of physical attraction plays a key role in the development of limerence,
 but is not enough to satisfy the limerent desire, and is almost never 
the main focus; instead, the limerent focuses on what could be defined 
as the "beneficial attributes". Nevertheless, Tennov stresses that "the 
most consistent result of limerence is mating, not merely sexual 
interaction but also commitment".
Limerence can be intensified after a sexual relationship has 
begun, and with more intense limerence there is greater desire for 
sexual contact. However, while sexual surrender at one time indicated 
the end of uncertainty felt by the limerent object – because in the 
past, a sexual encounter more often led to a feeling of obligation to 
commit – in modern times this is not necessarily the case.
The sexual aspect of limerence is not consistent from person to 
person.  Most limerents experience limerent sexuality as a component of 
romantic interest.  Some limerents, however, may experience limerence as
 a consequence of hyperarousal. In such cases, limerence may form as a defense mechanism against the limerent object, who is not perceived initially as a romantic ideal, but as a physical threat to the limerent. 
Sexual fantasies
 are distinct from limerent fantasies. Limerent fantasy is rooted in 
reality and is intrusive rather than voluntary. Sexual fantasies are 
under more or less voluntary control and may involve strangers, 
imaginary individuals, and situations that could not take place. 
Limerence elevates body temperature and increases relaxation, a sensation of viewing the world with rose-tinted glasses, leading to a greater receptiveness to sexuality, and to daydreaming.
People can become aroused by the thought of sexual partners, 
acts, and situations that are not truly desired, whereas every detail of
 the limerent fantasy is passionately desired actually to take place. 
Limerence sometimes increases sexual interest in other partners when the
 limerent object is unreceptive or unavailable.
Limerent reaction
The limerent reaction is a composite reaction – that is, it is 
composed of a series of separate reactions.  These reactions occur only 
where misperceptions meet adversity in the context of a romance.
  Perhaps because of this unique specificity, limerent reactions can be 
uniquely quantified and predicted according to the schema described 
below. 
Involvement increases if obstacles are externally imposed or if 
the limerent object’s feelings are doubted. Only if the limerent object 
were to be revealed as highly undesirable might limerence subside. The 
presence of some degree of doubt causes the intensity of the feelings to
 increase further.  The stage is reached at which the reaction is 
virtually impossible to dislodge. This adversity may be superficial or 
deep, internal or external, so that an individual may sometimes generate
 deep adversity where none exists.  Also "romance", as it were, need not
 be present in any genuine way for a limerent reaction to occur. 
The course of limerence results in a more intrusive thinking 
pattern. This thinking pattern is an expectant and often joyous period 
with the initial focusing on the limerent object’s admirable qualities: crystallization. Then, under appropriate conditions of hope and uncertainty, the limerence intensifies further.
With evidence of reciprocation (real or imagined) from the 
limerent object, a state of extreme pleasure, even euphoria, is enjoyed.
 Thoughts are mainly occupied with considering and reconsidering what is
 attractive in the limerent object, replaying whatever events may have 
thus far transpired with the limerent object, and appreciating personal 
qualities perceived as possibly having sparked interest in the limerent 
object. At peak crystallization, almost all waking thoughts revolve 
around the limerent object. After this peak, the feelings eventually 
decline.
Fantasies are preferred to virtually any other activity with the 
exception of activities that are believed to help obtain the limerent 
object, and activities that involve actually being in the presence of 
the limerent object. The motivation to attain a "relationship" continues
 to intensify so long as a proper mix of hope and uncertainty exist.
Limerent duration
Tennov
 estimates, based on both questionnaire and interview data, that the 
average limerent reaction duration, from the moment of initiation until a
 feeling of neutrality is reached, is approximately three years. The 
extremes may be as brief as a few weeks or as long as several decades. 
When limerence is brief, maximum intensity may not have been attained. 
According to David Sack, M.D., limerence lasts longer than romantic 
love, but is shorter than a healthy, committed partnership.
Others suggest that 'the biogenetic sourcing of limerence determines its limitation, ordinarily, to a two-year span',
 that limerence generally lasts between 18 months and three years; but 
further studies on unrequited limerence have suggested longer durations.
 In turn, a limerent may only experience a single limerent episode, or 
may experience "serial" episodes, in which nearly one's entire mature 
life, from early puberty through late adulthood, can be consumed in 
successive limerent obsessions.
Bond varieties
Once the limerent reaction has initiated, one of three 
varieties of bonds may form, defined over a set duration of time, in 
relation to the experience or non-experience of limerence.
  The constitution of these bonds may vary over the course of the 
relationship, in ways that may either increase or decrease the intensity
 of the limerence. 
The basis and interesting characteristic of this delineation made
 by Tennov, is that based on her research and interviews with people, 
all human bonded relationships can be divided into three varieties being
 defined by the amount of limerence or non-limerence each partner 
contributes to the relationship. 
With an affectional bond, neither partner is limerent. With a 
Limerent-Nonlimerent bond, one partner is limerent. In a 
Limerent-Limerent bond, both partners are limerent. 
Affectional bonding characterize those affectionate sexual 
relationships where neither partner is limerent; couples tend to be in 
love, but do not report continuous and unwanted intrusive thinking, 
feeling intense need for exclusivity, or define their goals in terms of 
reciprocity.  These types of bonded couples tend to emphasize 
compatibility of interests, mutual preferences in leisure activities, 
ability to work together, and in some cases a degree of relative 
contentment. 
The bulk of relationships, however, according to Tennov, are those between a limerent person and a nonlimerent other, i.e. limerent-nonlimerent bonding.  These bonds are characterized by unequal reciprocation. 
Lastly, those relationship bonds in which there exists mutual reciprocation are defined as limerent-limerent bondings.
  Tennov argues that since limerence itself is an "unstable state", 
mutually limerent bonds would be expected to be short-lived; mixed 
relationships probably last longer than limerent-limerent relationships.
 Some limerent-limerent relationships evolve into affectional bondings 
over time as limerence declines.  Tennov describes such couples as "old 
marrieds" whose interactions are typically both stable and mutually 
gratifying.
Mitigation
In her study Tennov identified three ways in which limerence subsides: 
- Consummation (reciprocation)
- Each limerent has a slightly different view of acceptable reciprocation, and the reactions to reciprocation vary. Some limerents remain limerent (as documented by Tennov), while for others the limerence subsides as the certainty of reciprocity grows. Other limerents do not achieve any "real" consummation (e.g. physical, or in the form of an actual relationship) but find their limerence waning after a limerent object professes similar feelings.
- Starvation
- In this process, a lack of any notice (i.e. starvation, described by Tennov as "the onslaught of evidence that LO does not return the limerence") causes the limerent to gradually desensitize. This desensitization may take a long time, in which case a limerent's latent hypersensitivity may cause any attention given by a former LO, regardless of how slight, to be interpreted as a reason for hope, precipitating a resurgence of limerence.
- Transference
- The limerent transfers their romantic feelings to another person, thereby ending the initial limerence; the limerence is sometimes transferred as well.
Continuing research
Tennov's research has been continued by Albert Wakin, who knew Tennov at the University of Bridgeport but did not assist in her research, and Duyen Vo, a graduate student of Southern Connecticut State University.  Their goal is to refine the term limerence so that it refers mostly to the negative aspects. 
The term "limerence" has been invoked in many popular media,
 including self-help books, popular magazines, and websites.  However, 
according to a paper by Wakin and Vo, "In spite of the public’s exposure
 to limerence, the professional community, particularly clinical, is 
largely unaware of the concept."
 In 2008, Wakin and Vo presented their updated research to the American 
Association of Behavioral and Social Sciences.  They reported that more 
research must be gathered before the condition is suitable for inclusion
 in the Diagnostic and Statistical Manual of Mental Disorders (DSM).
Critics point out that Tennov's account "is based on interviews 
rather than on direct observation", but conclude that "despite its 
shortcomings, Tennov's work may constitute a basis for informed 
hypothesis formulation".

