Bruh just ignore it.
You are giving him what he wants. Attention.
Ignore everything he does and say nothing about him. It just makes him happy and continue on what he's doing
I was gonna. When he left I made this like "oh hes gone it doesnt matter if I make something about it cuz hes already gone' but then he came back in the middle of it like what was I supposed to do. I kinda liked what I made and didnt want it to go to waste so oof.