in Love. I've been thinking about it a lot lately.  What does it mean when someone says, "I love you"?

Does it mean that the person is so enamored with their idea of you (either real or perceived) that they overlook the faults that others can't?  Does it mean that you have a significatnt place in their heart that makes them willing to do near anything for you? (legal or otherwise?)  Or does it mean that they like you, or perhaps lust after you, a whole, whole lot?  Maybe it means that he's just-that-into-you--enough to pursue you like a drug addict chases his next fix, and actually put a ring on it.

I don't know that there is one common definition or description of what it's like to fall in love.  Could the most universal experience be revealed in the phrase? 

Here's a definition to try on for fit: Falling in love is when you feel like you're falling--quickly or slowly, but inevitably. Your destination is uncertain, and you're not sure if you'll land in one piece, but it's okay because you're not alone.  Someone is holding your hand.