Love

Well first off I'm going to have to make a clarification, since that question is a little misleading as it is stated. Love is a real emotion, in our discussion yesterday I was explaining how a lot of people base their idea that love is somehow a gift from God and then cite it as evidence that God exists.
Love, as in the initial attraction between two people that drives them to mate...and consequentially put up with each others crap, is chemical. So is every other emotion we experience. I don't say that from a point of random speculation, we can watch the signaling pathways firing, we can see the parts of our brain lighting up in an MRI that show these things.
What I was discussing yesterday is that people using love as a proof of God or using some sort of idealized love as their goal is wrongheaded in the extreme. If you are basing an idea on something that you can't even prove exists, especially something as important as love, and then you speculate on how this unknown creature wants you to...you hobble yourself and you cripple your chances for happiness.