<human>: Give me the gist of the text in a nutshell

I've been studying abroad in Norway since January of this year. Around Easter I met this guy through mutual friends and we immediately hit it off. We have incredibly similar interests, talk to each other every day, spend time together 4 to 5 times a week, go out to dinner see movies (he pays for everything) and we spend the night together at least 3 times a week. He is a PhD candidate with a year and a half left and I am a bachelor's student with two years left in my degree.

In my mind, we would be boyfriend/girlfriend if I weren't leaving to go home so soon but we've never really talked about anything future-y. I don't have a good track record with long distance relationships, and Minnesota-Norway is a pretty long distance. I don't feel like I've gotten to know him well enough to commit to being in such a long distance relationship, where the probability of us seeing each other more than 3 times a year is very slim, but I know I'm not ready to give up completely on the possibility of a relationship.

I guess what I'm looking for advice on is how to bring this subject up to him without seeming pushy or overly-attached or like I want more than he does.  Like I said, we haven't defined our relationship so I don't know if he views us as just a fling or as more. What have been your experiences with long distance relationships where the future was iffy?
<bot>: I've met and been dating a fantastic guy that I want to keep getting to know/date whilst on a semester abroad, but we never defined our relationship so I don't know where to go from here.