It's always an intense dream, full of fear, frustration, and anxiety. I don't know why I continue to dream of him or those situations. You may not want to discuss this old relationship and the feelings you have that attend it with your husband, and that is fine, I think. I do not know, from your dream report, whether you still have any contact with your old boyfriend. In that sense, I think you still care about him, probably wonder how he is doing from time to time, and probably still are very concerned that he is killing himself with alcohol - hence the deams where you are shouting at him about the state he is in.
Alcoholism is one of the saddest diseases around.
Like I said, I think it's natural to care, but unfortunately, as you learned a while ago, until your friend decides to try to stop using, there's little, if anything, that you can do. Your friend will have to hit rock bottom - usually abetted by wrecking the car and several DUI's, if not worse, and then slowly pull his way up and out of the nightmare. It's a hard situation. I feel sorry for your friend. But it's his choice.