OP: you have the advice of many experienced men telling you to preserve your dignity and walk away.
My guess is that for some reason you think you can’t do better. You talk a good line “I can dump her easy”, but you won’t. Spare yourself the grief, you’re a rookie trying to jump in the rink with a heavyweight, she’s running circles around you and probably ridiculing you to anyone she talks to.
For you to think there are no other involved with her the other 5 nights is naive. She’s been on OLD forever, has seen a lot of cawk, and you think she doesn’t have at least three other guys on speedial? Do you really think she isn’t getting hit up like every single day to fack?
Again walk away. The mental masturbation you’re engaging in on the thread is not helping you.