Girlfriend drinks with other guys?

Ldm2015
Hi. I'm 17 and my girlfriend is 15 we have been together for the past 7 months. the relationship didn't start of well because on the fifth day we had a drunken get together at her house and she got off with an other guy in front of my face, but I was too drunk to get off the floor lol, well the next day I didn't go mad at her because she didn't remember because she was way too drunk aswell her best friend had to tell her ab out it well I let that slide I blamed it on the guy as he was supposed to be a mate but kept making us drink and he was sober..

well a month later on a sunday while I was working she and her sisters and a few of my m8s went out to get wrecked at a river and she kept trying to get off with a 30 year old guy, but she didn't becoz he wudnt and my m8s stopped, since then she has became a better drunk lol.

but every time she goes out drinking without me, she goes out with a bunch of guys from 14 to 19 roughly and 1 girl and every time at least 4 different guys try to get with her, but she assures me she hasn't done anything since that first time,

our relationship is going well, but is her going out with these guys a major problem, I have tried to stop her many times but her excuse has always been I didn't know we were gonna be drinking,

what should I do?

advice from girls or guys plz
Girlfriend drinks with other guys?
2 Opinion