Mopsey, It appears that he's hit a pocket of the dark depression. He's light a hamster running on the wheel that goes round and round. He can't find his way out of the maze of uncertainity and it's going to take him a while to do so. When he does, he will have hit bottom. He's fighting it very hard, but he's got to find a way to look within himself to get there.
You're doing all of the right things. You've offered him your home as a safe haven, you have made yourself available to talk to him at all hours of the day and night and the most important thing, you've not shut the door on him. You've been nothing but kind, loving and compassionate. These are the things he doesn't understand right now. How could you still be there for him? He doesn't realize that love can be unconditional in a case such as this, whereby you see him bouncing all over the place.
Mopsey, your thinking is becoming clearer each and every day. You've realized that you can't sit around worrying about it. You are doing every thing you can to hold your family together. I do hope that you enjoyed your evening out w/your father and you and the children are enjoying the baking up of the cookies. I really do hope that the holidays will finally shed some light on what or where his head is at.
Enjoy your Sunday. You are doing everything you possibly can at this time. Hope's right, come here to vent, journal or just to chat. We've all been down this road and know how you feel at this time.
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.