And then do it - with the children. Take them somewhere. This may be where alanon may be useful - you may meet people who will help you. Alcoholism is fatal. In all cases.
Most drunks never find AA until they have hit bottom.
They lose everything - their jobs, their possessions, their families. It could be that the only way that you can save your marriage is to separate from him until he sobers up. This may wake him up while still preserving some vestige of love or respect for him in your heart. Do not give up love or hope for him, but do remember that you cannot control his drinking and that your decisions should take that into consideration. Sorry I couldn't make you feel better - dealing with alcoholism is a major problem.