Have you looked at PAWS, I felt similar to you at 6 months.......but there was no way I was going back to the colossal waste of time my life had become because of drinking, mentally I was not well.
At 6 months sober I was unhappy but I was more unhappy drinking, I am no longer unhappy and the thought of drinking rolls my stomach in a wave of nausea.
I think a check-up at the GP is a good idea....and getting active to improve your quality of life and mood could help.
Don't let the AV have the last word, tell it to bugger off....you have worked hard to get to 6 months and it is a wonderful investment to a good future.
Congratulations on 6 months.