AITA

so basically two of my classmates.. lets call them L and K( K is supposed to be my bsf), make fun of my forehead ( I'm insecure about it) and I normally laugh about it because what else am I really supposed to do? ( 'you can play tic-tac-toe on THAT forehead' ) BUT today L took it a bit too far he asked me what's it like having a receding forehead and is it genetic???( K was laughing in the back when he asked that question) and we had just come out of a maths exam that morning and I wasn't in the mood for his bs and I said it's genetic ,I didn't chose to be born with a big forehead ask my Grandad He's dead and then I didn't speak for a good 5 mins and K goes Azi you good and I stay silent cuz I ent speaking to any of em so I ask if I can toilet cuz I'm about to start crying and then I went to my head of year and reported them and she spoke to them

My 15 year old thinks it's hilarious to call my forehead a five-head 😑
I do have a big forehead though. I just laugh it off - he's not a mean kid at all - it's only a joke and I know he'd be mortified if I were actually upset by it because he's got a very kind heart.
Your friends were being thoughtless but I doubt it was meant to be malicious, it was just a bit of ribbing meant to be funny. Just tell them you don't like it though, if it bothers you. I think you could do with a thicker skin though.

they know i don't like it and they still make fun of it and L is not my friend he's one of K's boy best friends