Mixed emotions, no matter what the motives or maturity of the individual is a problem only they can work on.
If you can emotionally ride this roller-coaster with her without loss of self-respect and later can forgive and forget if she does happen to come to you after figuring out what she wants, then consider yourself stronger than a lot of other men.
Have an honest talk with yourself and think of what you would advise someone else in your current position and level of maturity. Ask how much you are willing to put up with and the time you are willing to invest without knowing the outcome.
I can see this is a stressful time in your life and stress is not healthy for anyone. So, I would plan on living a live without her and looking for new friends and activities to keep busy.
Rejection of any sort is painful, but we can accept it and cope with it in time. You know that we will be here for you no matter what your decision, so stay with us and keep us posted.
Some people just need longer to grow up than others.