Sara,
It sounds like you are already doing a great job! I was very pissed too at times and took some of it out on my loving wife. They were difficult times in our marriage.

He has a ways to go and it will only get worse. I would recommend a support group for you to better understand the changes that he is going to go through and to obtain better coping skills for yourself. We are always here to help also.

The treatment will really beat you both up. Just take it one day at a time.

Working on acceptance and possibly a spiritual reason or solution for all of this is the best I can come up with.