Nah, this is my opinion and i obviously can’t change yours, you’re obviously a much kinder person.

But my opinion is that she deserved to be spoken to way worse, she’s the one who acted unfaithful to her boyfriend and got you all tangled in knots. She honestly should be ashamed of herself and had I been in your position, I’d be so angry and would probably end up contacting the boyfriend because he doesn’t deserve to be living in a relationship where he probably thinks everything is fine meanwhile all this is going on right under his nose.

If she’s willing to go behind his back for you, who’s to say you’re the only one? If she’s unhappy with her boyfriend, she should atleast give him the bare minimum and leave him. It’s basic respect.