I'mma just repost what I posted the last time someone brought this up:
I think that love is a social construct designed to glamorise and elevate to another plane what would otherwise just be actions and feelings between two people.
It stems from a desire to make aspects of human relationships seem ineffable or transcendental, and therefore somehow more special and significant.
Personally, I don't really believe in 'love'. I think that what goes on between two people can be 'reduced' to actions and words and simpler, more easily verifiable emotions like happiness, desire, admiration and affection.
This might seem like kind of a cold, materialistic standpoint, but I find it actually quite liberating. You don't have to wait for Cupid to shove an arrow up your arse that's tipped with just the right kind of pixie-dust. There is nothing that happens between us that we don't understand and cannot explain.
Recently [well, not so recently now] I really liked a girl, and she gave the impression that she liked me just as much. A few days later, she was talking about the absence of a 'spark', and I despaired. I don't see how right-thinking people can believe in things like that.
But maybe that's just me.
"I see no reason why what goes on between two people needs to be processed in this language of mystification."