Constantly blaming my gf when drunk

Recently I realised that everytime I get drunk I get angry over little things, and I can’t control it. Most of the time I drink or party with my beloved girlfriend, and I feel so fucking horrible for getting it out on her. Last night we were at a concert and I told her to stay in the crowd to hold our place while I go to pee, and she insisted to follow me, and of course I lost my temper over our place. I get hysterical, I want to immediately go home, like my night is ruined. We don’t fight ever when sober, and I don’t know why am I like this, even tho I don’t have any problem with her. She feels sad when I get this angry at her, and I regret it as soon as I lose it.

I would like to hear similar stories, possible solutions, anything to help.

Tl Dr; looking for tips or reasons why do I lose my shit on my gf, only when I’m (blackout) drunk