I was with my loved one for five years of active binge drinking behavior. Knowing about Al-anon the whole time.
Finally I went. We were together another four months, and that was 16 months ago....I still go to at least one to three Al-anon meetings weekly (and some Open AA meetings).
Al-anon is helping me in all my relationships (my codependent behavior was in place way before living with an alcoholic).
I find if very helpful even though I have no active addicts in my daily life.