I'm sorry for what you're going through--it is a very familiar story.
You ARE trying to control him. He DOES have the right to drink in his own home. As you discovered, keeping it out of the house won't prevent him from drinking anyway.
Just two things. I'd put any immediate wedding plans on hold for the time being. Second, start learning all you can about alcoholism, and I'd suggest you find an Al-Anon group and start attending.
Ultimatums don't work. Al-Anon can help you get your head clear so you can decide how you want your future to look. In the meantime, strategies such as setting good boundaries and detaching can help make life more bearable.