Is there something wrong with me? If so, please inform me of what it is.

I genuinely don’t understand what’s wrong with me. Every time I’ve had the chance to have sexual relations with a man, I’ve rejected it. My last ex-boyfriend even thinks I’m a lesbian. While I’ve had sexual fantasies about men, I’ve never acted on those fantasies. I’ve had opportunities, but I’ve always found a way to either come up with an excuse or outright reject them, no matter how physically attracted I was to them. I’ve never experienced an orgasm. I’ve watched porn, but it doesn’t seem to have any effect on me. I was starting to think I might be asexual, but I do have sexual fantasies. I find women pretty, but I don’t see myself ever sleeping with one. I don’t think I’m attracted to them in that way. I’ve never been sexually abused.