Why don't I ever get asked out?

Maybe because you may come off as having a boyfriend as you say, or you may come off as like uhhh im too good for you, but it doesnt sound like you are at all, maybe people think that because thats what they usually think of pretty girls, uh trust me. Maybe they're scared you might say no to them becauseyour to pretty for them, and they dont want to be all emberassed. If you really want to be asked out, make yourself available. Let them know yu are attracted to them. But goodluck:)