Is something fundamentally wrong with me?

Ok, here's the thing. A guy I met online told me he was not romantically attracted to me. Which was odd, because I thought things were going great, he was telling me really flattering things, we were clicking very well and almost had sex and then he came to my door and said he was a virgin (in his mid 20's) and that he wasn't romantically attracted to me. And I am not entirely sure where that came from, it seemed to me it was a little bit out of blue. Oh, well, fair enough, things like that happen. The problem is though, this is the second time in a row this has happened to me. There was another guy, with whom we were doing really well for almost a year. We never labelled the relationship, but we were practically going out. However, when I asked him about where this was going he said he said he wasn't too attracted to me in a way he didn't want a relationship, but preferred to be friends (same thing the first guy said). So you would think I am not a great looking person, but I am decently good looking, I think. I am not overweight, I am not plain, I am not miss America or anything, but I suppose I am not hideously ugly. So my question is: is something else wrong with me? Can you attract a certain type of people and am I not reading signs very well? Or am I not choosing wisely? Both of these people were above-average smart and one of them had Asperger's and the other one,presuming he had never kissed a girl before me, was a little bit socially awkward as well. I know you probably can't help me, but I kinda felt the need to share and look for some friendly advice. Thanks

I think you guessed the issue right. You might be hanging around with the wrong men. They could be flirting with girls only to get confidence in themselves. Next time try to choose a socially okay guy and see where it goes?