To me is seems like he is still drinking and trying to get you to come back in to his life again so someone else can feel bad for his drinking.
I would cut all contact with him if you can or even if you want to because it isnt helping you by the looks of things.
Heis obviosly in denial still as he wouldnt try and make out your drinking was an issue,he would be focusing on himself.
Take a step back from him and no more conversations,look what they are doing to you!
You said a year so make it a year and if he comes back sober and wanting to stay sober then great but whilst you still have contact with him he is going to lie lie and lie again untill before you know it you will be back in the chaos.
Easy to say i know but its for the best and and definetly the best for you.