I feel like a joke

I’m a student, I have good grades and a nice friend group. But I started getting remarks from this one dude and it just chips on my self esteem, one day it’s playing a small joke where he pretended to run a sharpie on my sweater the next their making fun of me for drawing in math class. I wanna tell someone but nobody listens. I feel like I’m doing everything wrong in this situation and if I say anything it always gets worse. I’m starting to feel like everyone is just starting to think of me as some sort of sick joke they can pick at. And I know I should just “ignore it” or “stand up” or “get help” but I feel like it isn’t gonna do anything, it’s not like any of my friends listen anyways. (Their still pretty good friends, just not good at listening)