What is love?

Does anyone truly know what love is? It is so subjective, my iPod claims up to 8 gigabytes worth of different types of love. My psychology class tells about six different types of love.
Which is the best?

How can any one person determine the answer to that question, when there are 6 billion of us sharing this earth, something, which some would say, is the ultimate love? That being God, who created us, simply to loves us, and we are told sacrificed his only Son for us. Is that true love?
Perhaps, but a little too gruesome for me.

But does that in turn mean that I only want the love of warm fuzzies? The different parts of my brain have all decided to play Devil's Advocate.

If we can find someone attractive one day, decide we love them, and then turn around and fall in love with someone completely different later on in th road, what does that mean?
Does it mean that there are different loves for different people, or does it simply mean that we have developed, and alond with us, our love?

Does love, therefore, evolve. Has it changed so much that once upon a time it was some Darwinian perhistoric species; Did love mean hate at some point and now, in some twisted version, we love those who drive us crazy at the same time?

If you love someone once, truly love them, however you define it, does that ever go away. Wouldn't true love, being true, stay forever, and even though the person may fade out of view, the love never leaves? Perhaps if it did disappear, it wasn't love, or it never did disappear, we just tucked it away somewhere else so that we could love more, again, and our brain just keeps it on file to build on for the next thing in our spectrum to love.

If Love hurts, is it really love. Why would something that is supposed to be so wonderful, something everything is supposed to pine for, consciously or subconsciously, ever hurt us?! Maybe we are simply so masochistic that we feel there must be a price for something so ultimate and definitive, and that a little bit of pain is simply what goes along with the bargain.

It is for these reasons that I am cautious to ever seriously say I love anyone who is not related to me. Family love is a given, and I do not say I love someone in my family who I do not. But for those not in my genepool, lov, to me, is something that is so confusing to me, it is better left alone until I am sure what to do with it.