Brain chemicals and chocolate and stuff.
Infatuation is the state of being completely carried away by unreasoning passion or love; addictive love. Infatuation usually occurs at the beginning of relationship when sexual attraction is central. It is characterized by urgency, intensity, sexual desire, and anxiety, in which there is an extreme absorption in another. It is traditionally associated with youth.
Love is a constellation of emotions and experiences related to a sense of strong affection or profound oneness. There are some feelings we have when infatuated that we don�t have when we�re feeling love.
When infatuated we experience a surge of dopamine that rushes through the brain causing us to feel good. Norepinephrine flows through the brain stimulating production of adrenaline. Phenylethalimine (found in chocolate) creates a feeling of bliss. Irrational romantic sentiments may be caused by oxytocin, a primary sexual arousal hormone that signals orgasm and feelings of emotional attachment. Together these chemicals sometimes override the brain activity that governs logic.
The body can build up tolerances to these chemicals so it takes more of the substance to get that special feeling of infatuation. People who jump from relationship to relationship may be craving the intoxicating effects of these substances and may be �infatuation junkies�.
When the chemical flood dries up, the relationship either moves into a loving romantic one or there is disillusionment, and the relationship ends.