Dude....the longer you stay there doing absolutely nothing the more this will kill your self image, self esteem, and your securities.
We are all trying to help you here. In short, you and her have differing ideas of what you want in a relationship. It will never work and equate to happiness for you both. Sure one of both of you could stick it out longer..but the resentment, anger, and deminishing esteem will grow like a wildfire in California. Get the F out now! Said in a concerned manner, she is bringing you down and you know it.
Lesson I learned back in my 20s....NEVER lose your dignity over a girl. A man's dignity and confidence is the only thing that he really has to attract women. If you lose it over one girl who is not worth it..you are only hurting yourself in the long run.
I'm sorry bro...you're in a very difficult spot....but only you can take control. You know what you need to do and you know this is bringing you down inside. It's not worth it.