<human>: I'm a first time poster, I'll try to be as clear as possible. 

I'm currently, as the title says, in a relationship with my GF from high school for over a year. We started dating in our senior year. This year, we've both moved out and are attending college. The problem is that we are going to different colleges in different cities. We live 3 hours away from each other. We usually see each other once a week.

Since we started dating while we lived in the same town, we saw each other all the time. Every day at school and usually during the weekends as well. Now, we need to adjust to seeing each other way less frequently than we used to. I haven't had too much trouble with doing so; I've become fairly active in a few different student organisations so I'm pretty busy. 

My girlfriend, however, has not made a lot of friends. She's pretty shy and lives in a very big city now. She refuses to join a student association, but she clearly is not happy with her current social life. Therefore, she has become very dependent on me. 

Whenever she feels lonely, which happens a few days a week, she calls me for hours. I'm really trying to help her the best I can, but I run out of things to say after a while. The tone of the conversation is always negative and it drains my energy and positivity. I also can't be available for her 24/7. I just don't have the time to do so. 

We will most likely keep studying in separate cities for the next 4 years, and I'm not sure if it will become a lot easier for her to deal with the current situation. I don't really know what to do. I don't wanna break up with her, because I really love her, but I can't keep doing this. Do you guys know what to do?

Summarize the given text in a few sentences.
<bot>: After living practically next door with my gf, we moved to different colleges. She can't adjust and is dependent on me, which is hard to deal with, because it drains my energy. What should I do?