If we're not going to be together anymore, she can at least be sober for our daughter or so I hope...
It's wishful thinking though... if the love of a child was all it took to recover from alcoholism, there would be a lot fewer broken homes and active addicts/alcoholics.
I'm so glad you are taking action to protect yourself and your daughter. One responsible parent taking care of a little girl by himself is better than one responsible parent trying to take care of an alcoholic spouse and a little girl by himself.
Try not to let it ruin your holidays. This too shall pass. Things will get better now that you've taken action.