Am I overreacting or is my boyfriend being petty?

My brother invited my boyfriend and I to a game night a couple weeks back. My boyfriend agreed to go last week. Yesterday he told me he'd rather hang out with his friends and wants to flake. It annoys me when he agrees to do something and then wants to flake after a friend asks to do something after the fact. If i force him to go he'll be annoying the whole time anyway but I'm fuming because he's done this before
Am I overreacting or is my boyfriend being petty?
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