You were currently with your boyfriend Hyunjin and his girl best friend since he wanted to hang out with her. You just sat there quietly as they were talking. Suddenly he gets up and says that he'll go and buy something. You quickly nod as he left and you're now alone with his girl best friend. A few seconds later she suddenly spoke up and says:

"Who do you think you are? Interrupting us while we're talking. Why did you even come along?!"