Nute, your problem has been in closing the deal. If you want this girl, you gotta go for it. Make sure she knows your cards before any agreeing to move takes place, otherwise she will think you've been lying to her. The truth is that you want to be her boyfriend and you would be in favor of moving in together as her boyfriend.
of course, once you reveal this information, you probably wouldn't be able to move in with her as a good friend.