My gf is going to her friend's (male) 21st birthday tonight

Because this is real life and it will always kick u in ur idealistic nuts if ever u grow too hopeful of a ho.
99% of girls in general are garbage relationship-wise, and you in american culture bruh.
Listen to some gangster rape if ur still tripping about this obviously scandalous bitch. Call her a bitch internally
>bitch
>bitch
Yeah thats it anon, keep going
>BITCH
>FUCKIN SKETCHY ASS NON LOYAL ASS BOOTY AINT EVEN THAT GOOD ASS HO

Welcome back to reality, OP.
Go now in peace.

>>17773870
If it's her friend then she has a right to go...If you don't trust her then why are you still with her?

Because he's her friend.
You paranoid fuck.
Unless you have any sort of grounding in reality for your suspicions, you're just thinking about it too much.

>>17773870
Because girls like to have fun whether or not you're there. Deal with this reality or risk losing her for being too possessive. Happened to me and many of my friends.

>why would she do this to me?
she isn't doing anything to you. she is celebrating a friend's special occasion. get over yourself.