I find that sort of happens to me, except that I have an added problem wherein when I DO clue in that someone might like me, I start having a mental freak out, and distance myself from them as much as possible without actually telling them that I'm pulling away. =| This happens even if I DO like them, and I've only ever really been attracted to 3 people. All three of those people are now friends, and whatever it was that attracted me to them in the first place isn't there anymore.
I've been going along with it, and since I figure I have no need to hop into a relationship, and I'll somehow end up falling in love with someone when I least expect it. It'll happen when you're ready, I think.