I'm going to never reply to my (best)friend after we agreed to have a nightout
Why won't you reply?
They were such an alcoholic slob.
You shouldn't ditch your friends. You should reply to them. You made plans and should keep them.
I'm not a good friend to her. I feel like my presence makes her drink more. Besides, I'm not interested in watching her drink.
Don't you think it might be good to confront her and try to get her help for her drinking? You know you can make plans where alcohol with not be involved and you can still have a good time.