Why do we love

Love Why do we love? what do we gain from it? We seem to always want to love or be loved, but only to have one of the two people give up and walk away. Do we love pain more than love? Is there such a thing as true love? How long do you look for it, before giving it up? How old do you have to be to find love? Can you be too old and never find love? Can we die from broken hearts? If we never love can we miss love? God tells us to love like he loves, unconditional, and to always love one another. We humans can't do that. The quest for love has caused wars, brought large countries to their knees, costed millions of lives, For What?