I'm losing control

I moved to the city at the start of the year and I got a job at a bar and my manager and I are good friends, we are always getting drunk after work and I've been leaving work early just so I don't stay back and drink with him and now it's becoming a thing where I'm trying to avoid him. It's literally like he doesn't have any fucking friends and I'm sick of it, it's becoming a joke. I'm always turning up to work hung over or still drunk and awake and I just can't catch up. On my days off I just stay at home in my room doing nothing.....Im afraid that if I dont be his little drinking buddy I'll lose my job or maybe I stay because I secretly like drinking....

I like to have a drink but I don't need one all the time like he does, I don't even drink when I go home....

Should I find a new job?

I don't know how it happens. This Sunday we are going to the beach on our day off and we are going to get pissed. I didn't even agree to it, he just said RIGHT! this Sunday we're going to bondi etc and I was too busy thinking up an excuse that my silence was taken as a yes. He doesn't even care how this is affecting me, I'm starting to take a turn for the worst. When we are at work he is a cunt to all the patrons , everyone knows him but around me he's lovely and we have heaps in common but now I feel like he's rubbing off on me and I'm starting to feel like a tired bar tender and that I dont have time for peoples shit when usually I'm so patient.

I'm also angry at myself for not asserting myself. And im the type of person that bottles things up and I'll keep my mouth shut till I snap and make a spectacle of myself.....wish it would hurry up already