Treat him as you would a roommate. He's given you a vibe of wanting you to leave him alone. He's acting like a teenager in his behavior, so give him what he wants...alone time and plenty of it. Don't attempt to chat him up. Just leave him be. If he comes to you to chat, listen and validate. Don't offer up any suggestions/advice unless he asks for it. Go out and live your life, go to a movie, museum, play or just out for coffee. You don't have to explain yourself to him unless you feel the need in case of an emergency, otherwise, roommate status is what he has earned for now.
It's a marathon, not a sprint and this road has a lot of ruts and swerves along the way.
Continue living your life to the fullest. Keep the focus on you.
But I do want to point out one thing, if he should up and decide he wants to leave the marriage, it won't be because of what you have or have not done. It will because of the issues he is dealing w/inside of himself.
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.
