Surrey, been down a similar route to you by the sounds of it, divorce (with young children involved), her blaming me for EVERYTHING, drink problems that were way out of control ended me up it some serious mental mind ****s.
I went down the whole AA & CA (despite never having a drug problem) route, in a way it was swapping addiction (the meetings) for another, like someone mentioned with fitness. I think it's difficult because you can't compare where one person is to another, but I found the company, the need to be somwhere and people who understand what crazy **** you do a help. One big thing for me was 'the higher power/god issue', as an atheist I was a touch sceptical but my desire to sort myself out was much more important, and to me the higher power was the help of others, who don't judge as most of them will have done far worse things than you and wouldn't want to judge you anyway.
I often felt a bit of a fraud as I hadn't done anywhere near the journey most had but I could possibly have gone down the same path, but none judged me for that. I ended up going for about 9 months, starting with 4/5 meetings a week then down to 1 or 2 near the end. I never completed the whole 12 step thing but have remained off the booze for over 5 and a half years. I know people in the rooms who has been going for over 30 years, they needed that and fair play to them each persons problem may need a different solution.
I try and restrict my vices as one adiction or problem can easily be replaced with another, the whole adictive personality thing and you can soon see stupid behaviours popping up again, think adictive peoples mind is wired up a little funny.
I would recomend ringing a local AA or CA it doesn't matter adiction is adiction and going along, yeah it will feel pretty unfomtable at first and there will be stuff you don't like, but almost certainly better than the alternative.
For me now I have married again, taken on 2 step children, doing ok at work, have a new house and see my 2 children from the fist marrage twice a week. I don't like to think where I would be without help, I was my own worse enemy and keeping myself away from people who cared was my prison and made things a million times worse.
Good luck on the journey you choose and brave of you to ask for help.
Best wishes and if you want any questions answered just PM me, I'm not on here all that often and might not have the anwers but will help wherever I can