I'm Bi but I seem to attract guys more than girls?

I'm not sure why I seem to get more attention from guys then girls. Guys (even straight guys) will compliment my looks a lot, even male adults, but I never seem to get that reaction from females. I feel more comfortable around males because I'm not very ertive and I'm a little shy and girls usually expect the guy to make the first move. Whereas gay/bi males usually make the first move on me. I was just wondering is the reason I get little attention from females because I'm not very ertive? Could it be the way I look? I have a really cute-youthful face, I'm kind of short (5'7) and a little on the thin side, so I don't look to masculine. So basically good looking face but not so great body lol.