The feelings that you are experiencing are completely natural, most people in your situation would feel the same. Many people on this forum regularly feel or have felt these feelings.
Detaching is one of the main survival strategies in these situations. It is not easy and it takes time an persistence to achieve it but it can save your sanity. You can start by physically detaching and the more you practice the emotional detachment will follow.
I don't know how your husband behaves when he is drunk but would guess that, like most drunks, he likes attention and an audience. You could tell him that if he comes home drunk you don't want to be around him, and remove yourself to another room or even to another place entirely when he is drinking. Don't engage with him and definitely don't argue with a drunk, it is pointless and frustrating.
Some people completely change the event from a negative to a positive. On the nights that their drinker is drinking they plan a treat for themselves, for example they go out with friends or go to the cinema or just do something for them that they would not normally do.