Keep in mind that unlike men, women don't put a lot of stock into appearance alone. Your rating will be based largely on attitude, behavior, and personality. Depending on the girl, your rating may also be determined largely by the effect you have on those around you. It's a difficult mindset to get into, because you don't think that way. You're interested in this girl because you think she's hot and she has flirted with you. She knows that.
I'm generalizing here, and I could be way off base if this girl is special (which, from your description, it doesn't sound like). Ok, here's the generalization: she'll be interested in you if you're the guy that other guys at school follow. If you're a leader, socially, of 14 year olds, she'll be attracted to that. If you're confident, a little cocky, and you don't worship the ground she walks on, she'll probably be interested. If you're shy, the other guys don't respect you, and you break out in nervous hives every time you try to talk to her - you have no chance. You amount to little more than a confidence boost for her. She flirts with you, sees you wet you pants, and enjoys the fact that she's desired.
There's something wrong with a 14 year old's brain (mine was broken too when I was that age), that prevents guys from recognizing girls who understand and abuse the power that their appearance has over the guys around them.
If that assessment is off-base, I apologize. If you'd started this thread by talking about how you really connect with this girl on a personal level and you two have lots of common interests, share the same sense of humor etc. etc., I'd have responded differently. As it is, you remind me of so many misguided crushes I had when I was stupid.