Basically, it comes down to two things: confidence, and knowing how girls think. Unless you have teeth growing out of your eyes and more warts than a witch convention, you'll be able to pull very attractive girls just by actually knowing what to do and being (or appearing) incredibly confident.
Essentially, women put you in two boxes: friends and potential love interests. Once you're in the friends box, that's it, there's no getting out. However, it's easy to avoid once you know how. I'm not going to go into any more detail at the risk of sounding like some kind of womanising preacher, but don't lose faith. There's plenty of physically unattractive guys walking around with stunners.