They are good at hiding their true emotions. Let it go. This is his ordeal and his cross to bear. You just act "as if" and concern yourself with the day to day activities of your life--you and the kids.
The Bomb: 08/05 H moves out: 06/2006 H moves back: 01/07 & Out again: 01/07 H moves back: 03/08 & Out again: 04/08 H moves back: 05/09 & Out again: 07/09 Divorced 08-12 Kids: 22, 20, 19