What should i do about this girl?

This sounds like she is very confused about her feelings for you, that she wants you but when she has you she doesn't want you. She is leading you on and that you need to have a talk with her about this. It isn't right that she is misleading you whether or not it was intentional. Make it clear to her that you're getting very mixed signals and they need to be cleared up. Perhaps even spend some time apart if need be to figure out what is going on between the two of you.