from limer- (apparently an arbitrary syllable) + ence (a quality or instance of it)
the state of being infatuated or obsessed with another person, typically experienced involuntarily and characterized by a strong desire for reciprocation of one's feelings but not primarily for a sexual relationship.
Limerence (also infatuated love) 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. 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 has been defined by one writer as "an involuntary interpersonal state that involves intrusive, obsessive, and compulsive thoughts, feelings, and behaviors that are contingent on perceived emotional reciprocation from the object of interest".
Limerence, which is not exclusively sexual, has also 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.