Alcoholism is progressive. The only thing you can know for sure is that it will get worse over time - there is no question about it. Whatever you see today is as good as it will be until he quits drinking, and then it could take years before he recovers to the point where he can be an equal partner in the relationship. My husband hasn't had a drink in almost 2 years, but life is not what it would be if he wasn't an alcoholic. I like the comment about having hostages and not relationships.
You are on a sled traveling down hill. You can get off or stay on. You can not save him from the consequences of his drinking. You cannot love him enough to make him quit. It just doesn't work that way.
If he quits drinking and recovers to the point of being a good partner, you can make a different choice then.
Good luck. The fact that you posted is a sign that you have a voice in your head trying to take you down a healthy path.