Those girls are probably 'drop-dead gorgeous' because of make-up, and all the money they probably have to spend on their outer-appearance. Beauty in make-up and good clothes doesn't mean anything. Inner beauty and natural beauty are all that really matters, and if any boy doesn't notice you because you don't look like them; then that boy probably isn't worth your time. Someone who would like someone for their looks is not a good person to want to date, I bet you anything if he hangs out with them because of their looks; then he wouldn't be a good boyfriend anyway.
A good boyfriend is someone who loves you for everything about you, your personality first, though. No matter how you look.