Struggling with Sobriety on St. Patrick's Day

I really wanted a drink last night. I want to prove that I can have just one, but I know that's not possible. I've started sobriety a few times due to probation, but this time is just for myself. I know that if I had a drink at home, I'd be like "well it's St Patrick's day, I can go shoot some pool at the bar" (and have a few more) then I'd either black out, try to pick a fight with a stranger or my boyfriend. maybe urinate in a public place then fall to my knees the whole way home. all just to wake up late for work, call off. I would have bruises all over my body. I would have sat today at home soaking in my regrets and not knowing what happened the night before. I know I made the right decision to not stop, but it was incredibly hard..