Hello Friend, Thank you for reaching out here for help. I can understand your current suitation. There are two approaches to take this  forward to help him overcome . If he is ackowledging that he is doing something wrong, it's a good sign. You can jointly go for marriage or couple counseling sessions to figure out his problems and solutions. However, if he is not ready or open for a counseling session, then you can go for the first level session to figure our his reasons for depression and find out the possible solution and then you can guide him to recover.