Do you think it's over?

It sure seems she can't make up her mind. I wouldn't say it was over, but the best advise I can give you is to take time and venture for other relationships with other girls. Maybe it'll give her some of the space she needs and you can see that there are other fish in the sea. After a while, get back together and see how things pane out. If you guys click instantly, then great! If not, then there's not much to do. If you go back to how things were before, it just doesn't seem healthy for either of you, and I doubt things will ever change.