You are doing the right thing by leaving him be. He's going through a rough patch in mlc and he does feel a tremendous amount of guilt and shame for what he's doing/done. He's still very confused and he's spinning a bit.
All you can do right now is be a friend, i.e., listen, validate, be kind and have a lot of patience.
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.
