Last week I tried AA for the first time after being sober a year. All of the loneliness, lack of understanding, and zero support I felt is now gone. I tried a couple of different meetings. I have found awesome people of all types.
The person I ended up asking to sponsor me said...."there is no reason to ever feel lonely again...you have all of us, and we are family".
Everyone has all kinds of reasons not to go to AA....the 'god' thing, etc etc. If you don't want to be lonely, have people who understand your addictions, accept and love you for who you are - well, it's right around the corner in AA.