im short, with a small b cup, and a medium butt, is that why ive never had a bf?

It's all about the personality. Personally, you don't sound that bad at all. Just be you and guys will take notice.

Besides your look -- your personality plays a big role as well.

I know girls that have nothing, and still have lots of boyfriends.

no i think you are fine, your size sounds cute
it's probably something else