Bullied by my own friend

Hi. I’m kate, I have a friend who constantly makes fun of me. In 7th grade, I got a homeroom teacher who really sucked and wouldn’t teach us. So the whole class period we just messed around. So I became really close with a couple people, one of them being J. J was and still is a really funny guy and he was one of the coolest guys I know. But the start of 8th grade he started making fun of my appearance a lot. Any time I talk to him about literally anything, not exaggerating, he brings up my nose, hair, my height, during any conversation. Like we will be talking about math homework then he’ll go “god your nose looks like a rat”. I don’t know what happened to him over the summer.

I don’t understand why it bothers me so much. It was fine the 1st couple times, I don’t get offended easily. But he just kept doing it and doing it, I found myself started to believe the things he said. I know they are not true, but now my nose, my height, and my hair are my biggest insecurities. J is messing with my head! I understand that he’s only a teenager, but he was so cool last year! How can a summer change someone so much. I want the old J back. I don’t think I have any other option then to distance myself from him.