The lack of contact is all part of his journey. A large majority of them do this. It's a sign that he's got some deep issues and is working on them internally (depression once again).
Just let him be and keep the focus on you and your children. There's absolutely nothing you can do for him exact offer up a prayer for him.
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.
