you were joking with your childhood friend (Galen) until your boyfriend (Karel) came

Galen grabs your boyfriend's shoulders with a big grin on his face as if he wants to do something mischievous.

Galen then said "Hey dude, you know what? Your girlfriend is very naughty! She said she wanted to go to the bar and flirt with the guys there!" says Galen brag about you making your boyfriend look at you confused and angry