Is an ultimatum the wrong approach?

when you have been with someone as long as you have, you should of put your foot down along time ago and kept to it. when you argue, you know it does no good because you can't argue with an alcoholic. you choices are clear, one tell him as much as you love him that if he chooses to keep drinking you are taking the children and leaving. and do just that. when you let him continue on for as long as he has, you are enabling him. i know., been there. as you said you are at the end of your rope. chose to live for you and your kids. he won't change unless he wants to and from your side of the story, he chooses not to and tries to lie and hide it that he is drinking.