Well, we all love to make our lives sound more dramatic and far more important, so I suspect most of the people here to fabricate what 'love' is. Most definitions of course being incredibly exaggerated, perhaps euphoric.
Without the science to make my self sound smarter then I really am -
Love is a life support for reality. Life is not about love, and anyone that says this should slap them self because I'm pretty sure they stuck there dick in at least fifteen people by the time they put some thought into 'love.' (Forgive me, I'm just cynical, bitter, and above all I don't have a Huskie plushie.)
Theories say it's a chemical release, which should be a tad obvious since basically every way how the brains function is releasing f*cking chemicles. Example - What's lust? the urge to fuck something, How? a chemical release. Now hopefully we can all realize saying 'love is a chemical imbalance.' Is as helpful as saying the sun is bright.
Love is something that's far too much judged. Something which the morons in the world like to say only few groups of people are capable of. Such bull shit, patience testing quotes I have heard -
'Gay's will seem like they love each other. they'll kiss and hug each other but they'll never actually feel love, gay people can't feel love.

'
'Animals don't feel love.' (Even though humans are animals?)
So what is love in my opinion? It's like a euphoria, and it's not exclusive to only one species. We can't judge how important love is, or if it even matters. All I say is I'd prefer to live in a world with love, as abstract and artificial as it may be then one without it.
Or maybe these are just the ramblings of a confused and irrational bitter guy. =l