I have no idea because I haven't felt more than a slight attraction to anyone since middle school. At the time, I had crushes on two guys. I "loved" one out of pure physical attraction (I now blame this on pubescent hormones). The other guy was the most intelligent kid in the class, and intelligent people earn huge points in my book. The first guy ended up rejecting me and I was never brave enough to approach baby einstein. After that, the crushes disappeared.
I think part of this comes from fear. A key part of relationships is communication, which I'm horrible at. I have trouble expressing my feelings to other people, and I'm never sure exactly how others feel unless said out loud. Because of this, I never thought about a guy long enough fall in love with them. Realizing the amount of social skills relationships require has kind of opted me out of the dating scene. I know that's a lazy attitude, but with all of my other problems at the moment, it's been put on the back burner.
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“Oh - You're a very bad man!
Oh, no my dear. I'm a very good man. I'm just a very bad Wizard.”
― L. Frank Baum, The Wonderful Wizard of Oz