My Girlfriend Would Threaten to Break Up with Me

“Like I said, I have something I can’t miss tomorrow. ……”
“Is it more important than me?”
“I didn’t say that. It’s just a concert I’ve always wanted to go to. I can go on a date anytime, but the concert is only tomorrow. ……”
“Oh, okay. Make a choice. You can either go on a date with me, or I will break up with you and you can go to the concert.”
“W-Wait a minute. Why are you giving me an ultimatum?”
“Meet me at Shibuya station at ten in the morning. If you’re late, it’s over”
I couldn’t find the energy to go after her.
No matter what I said to her, she wouldn’t listen to me.
—-I had already given up on her based on my previous experience.