The OP said his girl couldn't remember saying those things. Some of you act like you are angels and have never done or said anything bad when drunk. We've all been there at some point in our lives. And if you haven't yet, then you will some day (as long as you actually drink).
With some of the responses in this thread you'd think she went and fucked some other guy after he declined.
Bruh, there's a clear fucking difference between doing dumb shit while drunk and straight up talking shit to your significant other after they asked you to stop, all the while demanding sex after it all and insulting them again when they tell you that they feel uncomfortable.
Like jesus fucking christ. If that was a man treating a woman like that I don't think a single fucking one of you would be responding to OP with "AHH PEOPLE DO DRUNK SHIT EVERY NOW AND THEN, IF YOU DON'T UNDERSTAND IT OR LOOK PAST IT YOU'RE OVERREACTING".
No. We've all done dumb shit while shitfaced (if you've drunk enough). But publicly disrespecting your partner is a fucking line that I will never tolerate, personally speaking. If anyone ever treated me like that and wasn't fully apologetic/willing to change the behavior that led to it after-the-fact then I would walk. There are too many attractive, intelligent, and kind women in the world to waste time on someone that immature and senseless.
Unless OP was being a complete fuckface while they were pregaming, or something to even remotely justify this kind of treatment, his girlfriend was completely and unequivocally in the wrong, and not in a way that you just chuckle off as some normative thing that we all go through as adults in the dating world.