Thank you for your reply and advice.
He can get quite defensive and angry when we have tried to confront things, so sometimes we just avoid confronting and discuss at a point when he seems more receptive. Sometimes the discussion is fruitful and productive and other times not so much. The main problem seems to be that he doesn’t think anything is really wrong. He thinks that his wanting to have a routine and do things in his particular way is what the problem is, rather than his reclusiveness, lack of communication, apparent anger or moodiness and lack of desire to do anything really.