eeerooo this will be a good thread to read sober i think. I'm with least on the pets thing, the partner goes before my cat no question. I agree that you will have a harder time than most as your partner is a pisshead and you have your son on the same path too, but you can get help and lead by example if you really want to! AA sounds like a great idea, you will have people who care, who support you and from what my friends say about AA you will more than likely make some sober friends too.
Good luck:-)