Long Distance and Fading of feelings?

My boyfriend and I have been dating for 5 months and he went off to study abroad. The first time we started talking he was abroad too but then he came home for Christmas and we made so many wild, romantic experiences together during our short time. I've had much more experience and love with him than I ever have with any other boy that I have dated. But he took off again in February, the following week we chat and video call normally but later on he felt distant, he has many on his shoulder, he's an only child and he's responsible for his family which makes him so depressed, he does not like the course that he is studying and never even attends class, he drinks a lot and rarely has time to talk. He told me that this is not about me but about him. So we gave each other a week break and after that he called saying he wants to talk like we do again and we did, normally for about a week but weeks pass and we again go days without having a meaningful conversation, I am in constant pain even tho he's still mine, my heart is breaking. I feel like he's just hanging on because he pities me or whatever. And this morning I asked about his feelings again, he said, it is slightly changed. And then I asked him, do you want to break up? But he said, "No, it's not like that, its not about breaking up it's about me and my life problems." He said his feelings slightly changed but he doesn't want to break up, he still calls now and then but I don't even know what I am putting myself out for.

Long Distance and Fading of feelings?
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