Mental Ill Boyfriend

So my boyfriend and I have been together for a year and a half, but he really struggles with his mental health and Im not sure what to do any more. In the past, when it’s gotten really bad, he broke up with me as a coping mechanism sorta, and I know that sounds bad but whatever. Anyways things have gotten really bad again and I just don’t know what to do, I want to be there for him but then I worry about him and then he feels worse because he’s making me worry. Things have just gotten so hard, and sometimes it feels like he’s pushing away again and I’m so scared of another breakup. Oh and also we’re moving 3000 miles away from each other next month for college.

I know the obvious answer is breakup but I just can’t do that. I just want to be here for him to help him get better, but it’s taking such a toll on my mental health. Any advice?