So my first post I put of this is right here

I'll try to make this as brief as possible..

Update:
I've personally concluded that this was obviously petty and terrible behaviour on her part. The question still lies on how I should be treating her from now. I already know she doesn't feel remorse for her actions. I can tell that she wants me to feel hurt like I've hurt her. I've been running a lot of unintentional dread game as of late and she's really been pushing back (see my last post)

I've resisted every urge I've had to text/call/ and see her in person to just totally reem on her for being such a hypocritical bitch but I realized that's all part of the game that she wants me to partake in.

She has just called me after being home from work and was clearly pushing me to talk more than I wanted to. She inquired on how come I didn't seem happy, and to confirm our plans to hang out tomorrow. I cancelled them then and there. I said i had something pop up that needed my attention which led to her getting increasingly frustrated and angry when I wasn't answering Why? and How Come? I was being completely calm while she was screaming but my patience was being tested so I let out "I don't feel comfortable seeing you tomorrow" and "I don't think it's appropriate." I probably broke frame saying that.

Question:
I'm unsure how to approach this scenario from here on out. My goal is not to end things but to obviously mitigate any future behaviour like this.
Should I just act all indifferent and unaware of her trying to make me jealous until I can mentally get over it myself?
Should I call her out on her bullshit and directly talk to her about it?
Should I A&A this situation until I keep getting laid again?
or
Should I end things because this isn't salvageable?

TL;DR Gf went out last night. Put male coworker all over her snap story for his birthday for everyone to see after criticizing how disrespectful it was for me to do the same thing.

Look, it's quite clear I'm still learning a lot and understand the answers are obvious to you guys right now. Your advice and harsh criticisms are welcome. If you want to call me some beta-cuck who's GF is fucking 14 other guys behind my back, fine, but I just ask that you at least provide an answer to my question.