I'm sorry that you're going through all of this and to have the stress of the relationship, on top of it all.

Needing to feel needed is important. Needing to go out, is also important, couples need date nights.

Maybe asking for the break up was a bit premature or the wrong solution? Some sort of compromise or in between could be discussed.

I guess from this thread alone it sounds like he's needing less time spent giving support when you are going through an overwhelming amount of things in your life and need support the most. I don't quite know how to take bossy in terms of relationships, but I get space requests and what the need for toning down can mean.
For me, I personally become overloaded with life's day to day stresses and demands. And find myself at breaking points in my ability to give time and energy. And it's not that I don't care, it's that I need to juggle things around and become overwhelmed and my own headspace feels about ready to explode. Maybe that's going on with him?

About fainting. I've recently read they can be seizure related, like a partial complex or they can be from other health issues, you mention kidneys. Keep monitoring. And I hope your health is ok.