Blackouts are scary - they are what finally got me to stop. I was driving home drunk in a blackout at least once a week.
I imagine it's very hard with your husband drinking the way he does. I think it's going to be important for you to not compare your situation with his. I spent a lot of time being jealous of other drinkers but my problem is mine and mine alone.
Are there times when he wants to quit? Are there sober times when you can tell him you need his help?
You're doing great - keep at it!!