Talking to this girl. help?

So ok, I'm 18 and she's 22( please don't judge) and we've been talking and I think she's great and she has shown interest in me the only bad part is that she lives 3 hours away. Sometimes I feel like I'm too immature for her but then again she shows interest. I'm trying not to assume she likes me but it really seems as tho she does. My issue is that I'm not sure how I should proceed with this, should I just wait for her to make a move or should I?