I know how you feel, I experience the same sort of thing. It makes me reluctant to get into relationships even when they are presented to me, which is a very rare thing itself. I'd be somewhat inclined to blame it on a bad experience in a past relationship though.
My first (and only) boyfriend was a complete FREAK (he purposefully went out of his way to annoy everyone around him and he hates everyone in the world except for his friend from 5th grade) and it really put me off ever trying a relationship again. Up until that point, I had been ready to jump at the chance to go out with anyone (hence agreeing to go out with someone whom I knew to be a freak). We went out for a while, then two days after I finally managed to break up with him, one of the nicest guys I've ever known, who had a lot in common with me, asked me out. I turned him down though, and three guys since then. I'm terrified of getting into another relationship because I'm afraid that I don't have the ability to commit to someone like they deserve, because when I decided to go out with Mr Freak I figured that "love" or feelings of attraction would manifest themselves, but they didn't, and it makes me afraid they'll never manifest themselves.
Until fairly recently, I was a firm believer that falling in love with someone without knowing them intimately for years was a bunch of crap, and that love itself may even be a big hoax. Unfortunately I've developed a habit of feeling attraction towards guys I can't have. I don't know if I would actually keep those feelings of attraction if it were possible to "get" those guys (I think it may be a case of simply wanting what you can't have). Once again, it makes me afraid to do anything. I even ended up setting my (now ex)best friend up with a guy that I thought I liked. Unfortunately, I've gradually fallen head over heels for him . And they've turned out to be one of the most lovely couple, they're perfect for each other in every way. Now doesn't that just suck?
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*~Urabus~*
Why can't we live in a world where even chickens can cross the road without having their motives questioned?