Saying “I am upsetting you more and adding to your illness” is a good say to gently get yourself out of this. The first step is to move back into your own place while he is in the hospital. You can still be caring right now as a friend. I understand you are feeling guilty about breaking up with him while he is inpatient. He’s not a well guy. He’s abusive to you, not only to himself, you don’t want to fall in and commit to that.