hi there and welcome-
i'm afraid you are gravely underestimating the power alcohol has over alcoholics. this is a progressive disease. it sinks its teeth into them, bit by bit.
you would be wise to hold off on marriage and babies. i would also advise that you keep you finances wholly separate and do not enter into any property deeds together. also, watch out for drinking and driving. if you are going to an event where drink will be served, establish that you will drive home. if he won't agree to that, take your own vehicle.
give it some time. you'll see where we're coming from.
naive (no more)