You just don't want to take the risk. He, or the guys behind him could say stuff. But you need to be polite, so that he will not say shit about you.
"No, I'm sorry, I wanna stay alone."
"Oh ok, don't worry."
He said, a bit disappointed.
As you look at him, feeling a bit sad about him, you see Victor, a guy that used to bully you and your friends, walking towards you.
"Hey, I'll sit here Ok?"
He's obviously staring at your boobs