The answer is probably one you don’t want to hear, but it is the only one that will work for you: Additionally, I would encourage you to take this decision seriously.
I don’t know any person who has not ‘threatened to leave’ an alcoholic spouse as a leverage chip to try and get their spouse sober. If you say you will leave, yet don’t, you are reinforcing the fact that you think it is OK that they continue to drink.
I also hope that it serves as an inspiration to you that you are not alone, and that you really can live the life you want.
But the truth of the matter is that you have found this site because you already know you can’t continue to live your life the way you are currently living it, with an alcoholic spouse at your side.
So once you make your decision, you must also be willing to stick to it.