What can I do about this girl?

You have to tell her EXACTLY how you feel and see where it goes from there. If it is suppose to happen it will happen. I am going through the same thing myself kind of, well anyways my scared chicken **** self has not told him how I felt and completely withdrawn myself from the whole situation. Now I am kicking myself in the butt because our circle of friends told me if I would have just told him it would have happened. I didn't so IT didn't. Be honest and that's all you can do. It is what it is and it is what you make it...