When we are in love, neurotransmitters (information-molecules) like Endorphin and Phenyl ethylamine are secreted. Phenyl ethylamine is the infatuation-neurotransmitter. It is related to Amphetamine. The Physical affects of infatuation look like those of drug abuse. When the object of your infatuation stands before you, your hart will start to pound three times faster. More blood is pumped to your cheeks and sexual organs, and you will feel "butterflies in your belly". You will feel increasingly miserable to the point of being absolutely lost and self-destructive without the presence or approval of that other person.
Don't worry, It will wear of.
Some people however are so addicted to being in love, that they jump from one relation to another to feel the same high again and again. Depressed people often have a lack of Phenyl ethylamine.
The debated topic of human pheromones still carries some weight in the field of love research. The word "pheromone" comes from the Greek words pherein and hormone, meaning "excitement carrier". In the animal world, pheromones are individual scent "prints" found in urine or sweat that dictate sexual behavior and attract the opposite sex. They help animals identify each other and choose a mate with an immune system different enough from their own to ensure healthy offspring. They have a special organ in their noses called the vomeronasal organ (VNO) that detects this odorless chemical.
The existence of human pheromones was discovered in 1986 by scientists at the
Chemical Senses Center in Philadelphia and its counterpart in France. They found
these chemicals in human sweat. A human VNO has also been found in some, but not
all, people. Even if the VNO isn't present in all of us -- and may not be
working in those who do have it -- there is still evidence that smell is an
important aspect of lust (note the booming perfume industry). An
experiment was conducted where a group of females smelled the unwashed tee
shirts of a group of sweaty males, and each had to select the one to whom she
was most "attracted." Just like in the animal world, the majority of
the females chose a shirt from the male whose immune system was the most
different from their own.
"Love exists above the belt, lust below. Love is lyrical. Lust is lewd."