Yeah, go online and take the MAST test for him, you should be able to answer most of the questions for him, there are a few that only the actual subject can answer.
While marijuana is considered by most to have mild addictive qualities, the psychological aspect can't be ignored, you'll find posts from a lot of ex-users here that will attest to that.
For me, the most telling thing, he drinks ama, would be very surprised if his blood pressure medication doesn't have a warning against consuming alcohol while using the medication.
He's probably at least heard of AA, AFN shows commercials for AA-one of the few mediums where I've seen them-on a fairly regular basis, most larger posts probably have regular meetings on-site, and I wouldn't be real surprised if they have Alanon meetings there too.