Attraction/commitment issues...please help?

I only like guys that aren't into me. I always find myself attracted to gay guys and others who are out of my reach. I dumped my first boyfriend because of how much he liked me and how attentive he was. It freaked me out. My second boyfriend didn't go well either; he wrote a song for me when he started to really like me and shortly after I gave him the boot. The latest guy I was dating I liked until the third date. And I really liked him at first. Please, how do I put an end to this? What's wrong with me?