Hmmm.....Perhaps I can help you.
First of all, you are in the friendzone, but I have a simple fix.
Approach her and let her know that not only are you NOT her friend, but rather she has just made a mortal enemy for life for due to her overly presumptuous transgression.
Tell her that life is short and you refuse to be a glass dick in a jar and an emotional tampon for her. Then refuse to speak to her.
She'll either A: move on with her wretched life or B: Try her damndest to win YOU over so as not to be manless. She probably isn't even that good looking. If you are feeling this way, then yeah you could probably do better.