I really don't know how to get over this. I'm 17 at school, not very popular. I have friends but they never really stick up for me. This one dickhead who has the biggest IDGAF attitude I've ever seen (he makes himself look like a complete dick just to get back at people, no girls like him but he sure as hell doesn't help my girl game) so pretty much, literally every time I ask a question in a group chat, in class or pretty much anywhere, no matter how stupid the question or not, he always just says "haha clueless!!" And everyone always chuckles. I really don't know how to respond to this and usually give him no attention but this stonehead stops at nothing to give people shit. I don't know what to do, he's like a raincloud that follows me, when he's not there, life is great people are liking me and stuff but whenever he's around he torments me.