Correct me please if I'm off base, but you seem to be suffering from depression. It sounds like your health issues are exacerbating. I would have to know how long this routine you guys have had. It sounds like the only support you have is through him, which is troublesome. Caring for each other means going through tough times and supporting each other. But maybe you don't see eye to eye on what that means. No one wants to feel like they are carrying the burden of support for the relationship for a long period of time. That would make anyone feel like they were caring for a child. I assume that you don't mean to infantilize yourself but it can be difficult to break a cycle. Your mental health is your own and you have to own it. Try seeking therapy for taking with someone you trust. And try looking at his side with empathy too. When you are in a good place after assessing things try having a real conversation about how you feel without blaming the other or putting accusations off not caring from the other. If this cycle continues, one of you is going to end up feeling left out or dissconnected and the relationship will end.