What can you do about it? What can you do??
Frankly Molly, in my view, it’s time for a very direct conversation between the two of you, along the lines of “You have 3 months to make a material difference in this, or you have to go”.
If he is lying in bed all day, he has time to research and learn about the condition which would change his life within three months, whatever he does. If he makes a sustained, positive change, and you would have to agree an acceptable target, then he is on a rolling clock in terms of maintaining the changes. If he doesn’t make changes, then, in my view, it’s time for him to go and sort his life out for himself. He’s living the life he wants, for now.
If you can’t have this discussion with him, then you have to stop moaning about how awful it is, living with him as he is, because I reiterate, you are enabling it. You provide the roof over his head. You provide the bed he lies in. You shop for food for you both. And you do not address the crisis he is currently in, with no prospect of that improving.
If this man was performing this way in a job, he’d be moving down the disciplinary route, and making his way to the exit, due to non-compliance/under-performance in the most basic tasks. I know life isn’t a job, but if you don’t want your job to be 24 hour nursing a self-indulgent, self-inflicted invalid, then you have to take control now.
Woe is me no longer cuts it, with me anyway.
That’s my last on the subject as reading your response and writing this has probably raised my blood pressure.
An old boss of mine used to call times like this the “Fix it, or F’ off” moments.