Not all 'hot' girls are like that....Sorry to say, but that girl you dig sounds pretty shallow....or she simply has some certain preferences up in her mind.
I'm quite a physically attarctive girl myself, and I don't discriminate guys on exteriors. Probably it ahs something to do with the way you'r reared as a child.
My advice: Just eb yourself. Never be superficial. If that girl still can't see your genuinity, yeah....Time to move on I guess.