Originally Posted by
Knowledge 
I definitely don't want this to start affecting LO. And you're right. What I had thought I was doing was shielding him from it, obviously not. And I don't want the cycle to continue either.
As for your family, they might judge you. Then again, they might not. Keep your secret from them if you want to, that is your prerogative but find a safe place to vent (like SR!).
I don't know how old your child is but yes, he does know. He may not know it's dysfunctional, this is his "normal". That's the problem.
If you do stay on with your A I would really recommend getting your LO in to counselling as well. Al-Anon for you would also be very helpful. He however is going to need help if you are staying, that is a fact.
I'm sorry you are having such a rough time, this is not easy.