My question, what are you looking for that you don't feel you have already?
You're sober a year. Sounds like things are going well for you. About all I can tell is that one person told you you needed AA.
If it ain't broke, don't fix it.
I'm not saying to not go to AA. AA saved my life. I attend regularly, have a sponsor, work the steps, etc... I'm just saying, if there's no problem, then what's the problem?