OP again...
I realized I forgot to address some things, I am sorry.
May I ask why the recommendation to be celibate? We have been naturally, partly because he has no energy for that, but I am wondering what the reasoning is from those who have suggested it.
I tried once for a week to not initiate any conversation, and give simple responses, and he was perfectly content with that set up, never asking if anything was wrong.
As for his parents, I have suggested forgiving them, and attempting to make amends by being completely honest with them, as his parents are good listeners. However, they themselves can be quite selfish and defensive, I do not think they would acknowledge they were at fault. Hence, he has not tried to do so. He does not feel loved by them, and never has. They are good to us in other ways, but certain topics are like poking a sleeping bear. His brother is really messed up too, has debilitating mental issues.
As for an exorcism, does anyone know of a traditional Catholic priest we could see for that?
I am willing to accept this is probably my lot in life, and I cannot do anything about it. My whole life has been one great cross, I think I was made for suffering.