Sounds like a case of wanting what you can't have, and pining for the unavailable. This is how obsession, pedestalization, and one-itis occurs. Just remember that the other girl isn't special; a prize, or of high value for rejecting you - and vice versa for the other one.
Hot girls do this with everyone who doesn't meet their 500 standards, and doesn't "excite" or turn them on 24/7, so don't sweat it. Certainly don't view them as being out of your league, or "better" than you because of this. They're high maintenance and stuck up regardless.