I think the most reasonable idea is to keep visiting her for short periods, and keeping long-distance relationship in between. I think after a few months of such schedule you will get to know her enough to figure if you want to live with her. I decided to move in with my future husband after around 5 months of knowing him - but it was almost obvious for me just after a couple of months of active dating that we have a future together. Things happen fast in our age)))