My home fellowship is CoDA (Codependents Anonymous) and about half of the members there were also members of AA or NA. Some were dealing with issues of their partner's still using, but most were there because they were not only recovering addicts, but also very codependent themselves, and needed to address part of their recovery to those issues.
Being codependent is not always about loving an addict. Many codependents have never had issues of substance abuse in their lives. But they have a need to control or be controlled, they focus on others rather than on themselves, and they struggle in relationships and lose sight of thier own needs.
He very well may be codependent, and hopefully will one day discover that and address it.
Hugs
Ann