Love is

Love is any of a number of emotions and experiences related to a sense of strong affection and attachment. The word LOVE can refer to a variety of different feeling, states and attitudes, ranging for generic pleasures to intense personal attraction.
LOVE is both a Verb and a Noun.

CHEMICAL BASES
(scientific view)

Biological models of sex tend to view LOVE as a mammallian drive, much like hunger or thrist. LOVE has been divided into 3 partly overlapping states: lust, attraction and attachment.
Lust, exposes people to others; lust is the initial passionate sexual desire that promotes mating, and envolves the increased released of chemical such as testosterone and estrogen.
Romantic attraction encourages people to focus their energy on mating; attraction is the more individualized and romantic desire for speficic candidate for mating, which develops out of lust as commitment to an individual mate forms. recient studies in neuroscience have indicated that as people fall in love, the brains consistenly release a certain set of chemicals, including pheromones, dopamine, norepinephrine and serotonin, whic act in a manner similar to amphetamines, stimulating the brain´s pleasure center and leadins to side effects such as increased heart rate, loss of appetite and sleep, and an intense feeling of excitement.