I am starting this thread because the one I wanted to reply to was over a year old. I just want to say to all mothers out there that having a husband that acts more like "friend of the family" than a parent is a terribly sad and depressing thing for a woman to live through. It is almost abuse. I have had psychiatrists fault me for not divorcing my husband. I have also had psychiatrists dismiss my concern saying many men are like that.
My husband wouldn't change. I tried talking to him, going into therapy with him, and to this day I can say he is the same man. We now have a dog and he loves when the dog is sleeping but doesn't move off the chair to play or walk her. My younger son took the brunt of it since the oldest is quite independent. I didn't divorce because I felt I had to justify my decision to the children when they got older.
In every other way, he was a responsible member of the family. I would have left him if I had a strong support network but I didn't. In fact, my mother and sister still depended on me a lot. So my advice is to leave if you can. My oldest is now estranged from me because I am not a happy person. Ironic isn't it?