Quoting Jude the Super Kinkster:" <blockquote><b>Quoting Tiger Lily ♥:</b>" Depends on the circumstance. If there ... [snip!] ... short to worry about small smurf."</blockquote> What if it's "Get help for your alcoholism or we're getting a divorce"?"
In this case... I would go more for, "We need to be separated. If you want to search for help to deal with your alcoholism, I will gladly help you, but I will not help you continue your alcoholism and sit by and watch."
ESPECIALLY if there is a chance of not following through with your ultimatum. The worse thing you can do is give an ultimatum and not follow through.