silk
This is a progressive disease. In my early days I could stop at 3 or 4 but at some point those days would become less and my 'control' would become something more difficult to achieve. It is not all or nothing early on for some.
I would ask you not to bug him about going to AA as much but to maybe ask him questions about his drinking like,, did you plan to drink that much? Aren't you playing with your life and others drinking and driving etc...You aren't 'attacking' him allowing him to maybe look at his actions.
I've been him and I've been in your spot. Only he can decide to get help and say he has a problem.
AG