<human>: 20 yo male, just broke up with my girlfriend (21, f) of 6-ish months. We'd been good friends before dating, and when we started dating I kinda couldn't believe it was actually happening I was so happy. 

About two and a half months into our relationship she left to study abroad, and we decided to go on a break. This was so that she could fully get into the experience of studying abroad, instead of skyping home every week or whatever. During the time she was away, I did a lot of thinking about our relationship, talked to friends, my parents, people I trust. 

I came to the conclusion that breaking up was the right thing to do, because I'm not really ready to get married, or even think about getting married. I've got years of school left, I'm not really mature enough for an adult relationship, and I still feel self-centered in what I want to accomplish (not really thinking in terms of what I can do for the world, but what will make me happy). 

We broke up about a week ago, and it was a lot harder than I thought it would be. Just seeing her again, I remembered how amazing it was to be around her. Now we're broken up, and I think it was the prudent thing to do, but I'm not sure; it doesn't feel like the right thing to do. I know I still want the best for her, and I'm definitely going to think about this more. Thoughts?

Provide a brief overview of the text.
<bot>: broke up with my 6 month girlfriend about a week ago because I thought it was the right thing to do, no longer sure about that