He has checked out and is happy with his lot.
Stop doing anything with or for his family.
Not your job.
It doesn't make financial sense to divorce and poverty as you age from divorce is real.
Move into another bedroom.
Start living your life for you.
Give him what he wants, absolute peace and quiet.
Stop begging for crumbs of attention.
You are house mates going forward.
Time to accept your reality and look to a future where you live together but are single.
My friends older sister was in a very similar situation 15 years ago.
Children grown up and off living their lives.
They both worked but his greatest love was golf as much as possible.
He was a nice man, selfish, self absorbed, but he golfed all weekend, competitions, trips away, portugal with the boys.
When he retired he golfed every day and ate there too.
He had about 5 similar golf buddies and the club was their whole life.
It was very lonely and he would not discuss it.
She built a life for herself outside of the house, built a network of friends, holidayed with her sisters and went on group trips.
When he was 67 he had a life changing diagnosis which ended his golf completely and it was like suddenly her presence as a wife and carer would be required.
The realisation that she now was expected to be on hand 24/7 to drive him everywhere, bring his food on a tray and become his nurse maid was too much.
She realised that the love was long gone and she was not prepared to do it.
She told him the truth and said that he broke their vows long before "in sickness and in health" kicked in.
She was happy to sell the house and split the proceeds, but his care was not her responsibility.
She described herself as the ultimate golf widow.
Surprisingly she got zero judgement from anyone who mattered to her. They had lived separately for nearly 20 years, why would they now be together 24/7 because he needed care.
Her decision was 100% informed by the knowledge that if the tables were turned he wouldn't have given up a single game for her care, so she was going to give him the exact same consideration.