Family Issues Support Group
Family issues is a huge range that go from minor conflict to major misbehaviour and even abuse on the part of individual members of the family occur. Whether you feel you are in a dysfunctional family or you're dealing with a very specific issue, this is the place to talk about it and find others who might be going through the same thing.
I'd consider going to a 12 step support group. Addiction is tricky and he'll most likely backslide...
Is he seeing a psychiatrist? If he smoked that much pot, he was probably self medicating a condition...
Hugs.
I know that he could slide right back into that slump but the option is his to take and he knows the consequences of starting back in again.
I have an AA in Chemical Dependency and I do know what it is he is trying not to deal with and where this all started from. So I am fully aware of the what and why.