Well Nathan!
It sounds to me like this girl don't know what she wants out of all of this. The next time you talk to her, ask her to be very clear, and honest on whether or not she wants to be your girlfriend or friend. But, you have to be serious when you confront her on this. Honestly, I think she wants you as a friend, but doesn't want to hurt you. I could be wrong. Just tell her that it is very important that she makes it clear for you to understand what she wants out of this relationship. You sound like the kind of person that should take it one step at a time. So, after you do that, and get a real answer, come back for more advice. Okay!!!