Sorry to hear about your situation.
He has spoken to his GP but other than being prescribed anti-depressents they don’t seem to be that much help.
He did try a local addiction group but as he is so high functioning at the moment, holds down a job etc, they didn’t overly seem to be the right place for him either.
We have been paying for him to attend councilling sessions which he says are helpful. I struggle because I am not sure what’s happened to him to make him this way and he can’t or won’t tell me. He says that he doesn’t know himself what’s wrong with him.
I spoke to him recently about rehab but I don’t even know where to start with this.
He has now been staying at his parents for a couple of weeks. We are in daily contact. He says he has not drunk since he left but I don’t know if I can believe that. I hope it’s true.
I hope things improve for you and you can get him back on the right track!