Okay, I totally understand if y/n is oblivious and shut but like if they're stupid!?!, It's a no for me.
Dude, my reaction is just gonna be like:
For example;
A person is shady asf but you don't notice that like, they're always around you, not because they wanna be friends but because the want to have you all to their self and you don't notice, they're Sus like insanely Sus and everyone knows and they're warning you but instead you laugh it off and say; "Hahahaha, I'm sure it's nothing, he/she is just worried or they're just strange or they're just lonely, they wouldn't actually do anything to me"
You're dumb as shit