"Time to enjoy an alcohol free Christmas with my kids."
There you go! That's the spirit! The rest is all your addictive voice speaking, trying to convince you, tempting you. Seperate yourself from the voice, try to see it as another entity, a seperate part of your brain.
You can tell it to f off, works for me sometimes. Hope you have wonderful Christmas with your kids.
And don't expect it to be different tham the others because it will be, cause you will actually be there 100%.