Sorry for the confusion.

The OP is not sure if the boyfriend has a problem with drugs or alcohol.

The 3rd tradition states "The only requirement for membership is that there be a problem of alcoholism in a relative or a friend".

Since the OP can not state conclusively that the boyfriend does not have a problem of alcoholism it may be useful to her. For example I attend a parents meeting where I get to hear many parents stories about their adult children. Some of the adult children also have problems with mental illness.

I don't know of any other group like that.

Perhaps some has a better idea?