My girlfriend was added to a live video on Instagram with some rapper from NY. I asked who the dude was and she said just some guy who she liked his music. He only has 3k followers. She commented on a bunch of his posts before our relationship. I told her I did not want to see her tonight and cancelled our plans, left it at that and didn’t reply to all her messages saying how it’s stupid I’m getting mad. What could I of done better? Any tips on setting boundaries better? I know I can leave this girl for any other girl I want. Thanks for anything