HAHAHA JK You Should See Your Face!
Guys take rejection differently. Some might pursue a friendship with the hopes of the relationship becoming more, while others will seemingly disappear off the face of the Earth. This guy, however, did neither. He took the OP’s rejection in the strangest way possible.
After being denied the boyfriend pass because she already has a boyfriend, he decided to flip the table on her. HAHAHA she actually thought you were interested?! Man, that’s gotta be one of the most humiliating things ever! For you, we mean, not the OP. Just take the L and return to your bridge. You’re not fooling anyone, you troll.