Love is a difficulty fenomenon:
- It`s hight nervus system process in our brain, like social habbits etc .
- It`s a neuro-gormonal process , especially presented in a Gyphophisis.
- It`s a reflex , like a sexual something

zzz i dont know , this question need asking to Physiologists , Neurobiologysts
But anyway , this feeling is good , if compare it to another feelings like an anger , hunger (like hunger to money :O ) , i think love can make our live is better . something like that.
So i belive in the "True Love"
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Sorry for my English