I am sure you must indeed feel drained, talking until late about such serious matters like that. But it sounds extremely positive. He is now admitting he has a problem and is wanting to do something about it, even counseling. That is huge! It is a big step in the right direction.
I trust you are encouraged at least somewhat, as I know I am myself for your own sake. There's still a long ways to go, but we all know the saying about the start of every journey...