I'm going to go no contact with my alcoholic best friend
Is it because of her drinking?
Yes it is the only connection between us.
You should talk to her about her drinking first. If she sees you sober, it might motivate her as well. But you should at least tell her that is why you cannot talk to her anymore.
I don't want to, I just want a clean break. I'm moving to the next town.
It is hard to be with people that you had a drinking problem with but you shouldn't just cut them of completely. It would be nicer to say goodbye and ends things on a nice note.