I can understand all your concerns about your husband but I would really suggest you go seek out Al Anon meetings in your area and get some support for yourself. You are so focused on him and his problems and Al Anon helps you to detach and focus on yourself. Once that occurs, miracles can happen. Your increased knowledge about Alcoholism and the tools you will obtain about yourself and your part in the disease will be eye opening. It has happened to me. You will see that our co-dependent behavior is actually part of the whole picture. Once you address that and your husband sees that he may very well begin to open up more.
It truly can't hurt you and you may be surprised.Go to at least 6 meetings before you decide it is or isn't for you. Try several. I have found a wonderful support group and I have learned so much. Many women in the meetings have better relationships with their husbands and boyfriends than they ever have. This was due to the changes they made in themselves.
Good luck and be well.