He's got a lot of childhood issues to deal with right now. He was emotionally stunted as a child/teenager and he was always pleasing others and keeping his little mouth shut to voice "what about me? I need to be happy too" He was seen, but not heard.
Depression is the main ingredient of MLC. Depression is about the past and anxiety is about the present and future. It's going to take him some time to work through his issues. The IC may be able to help him, but there may come a time when he will shut down w/the IC too.
He's going to cut all of those "old" friends out of his life because they are reminders of his former life and they know him so well. He's going to get an entire new group of friends who really do not know his past. He try many different things along the way. Things that he has said that he would never do pre-crisis. Right now, he is the mirror ijmage of the good man, I.e., the exact opposite of the man you and love.
His journey is one that you weren't invited on and he needs to spread his wings and figure things out for himself. You didn't break him, therefore, you can't fix him. However, your journey is also beginning. It's a journey of self exploration, i.e., learning about yourself, thinking about what you want to do w/your life while he is orbiting the earth. It is a time to dig out that list of things that you've always wanted to do and didn't have the time. It's a time to create new memories and truly learn to love yourself. If you need to make changes, now is the time to do so. The changes are for you and not to win him back. They need to become a permanent part of your life.
Dig deeper for patience and learn as much as you can about depression and MLC.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.