She may still be carrying a torch for this other guy - or, she may be punishing you for his sins. Don't push her, and don't smother her, but you might want to ask if she is still thinking about the other guy, and whether she has specific doubts about you. Be reassuring.Honestly - I think it is a really, really, really BAD idea to move in with her. You two barely know each other, and she is being very emotionally distant right now- and you don't know what it is that she really expects from you. What in heaven's name is the big rush to shack up together? In four months, you barely know each others'favorite colors; why move in and hang yourself up with all kinds of financial complications? I would suggest that you wait at least a year to see if you are even still together before you go ahead and jump into that level of commitment without the foundation to support it.