He doesn't tell you because of the guilt and the shame that he feels when he goes. You have already made it clear to him that you feel he has a problem. He is just starting to figure this out, but he has not completely admitted it to the point where he is ready to give it up.
This problem is like the OW, it is something that he is ashamed of letting you see because he feels as though he is being judged. Although you are not judging him, that is how he is taking it when you ask or when he has to tell you. Kind of like a teenager who is doing something that they know they should not be and won't tell their parents because they don't want to get into trouble or have to own up to it.
I think alot of those classes are supposed to help you to not be your spouse's co-dependent or something like that. Just like with the MLC, he has to hit rock bottom here too. Again, another area that calls for prayer and that is about it.
I know frustrating, but the Lord is dealing with alot with him and this is going to take him some time. I mean from the things that you have said about him and the areas that he has a hard time with, are all pretty big to him. You are going to have a whole new person when the Lord gets through with him.
