Replying to Bully Advice

Aight so heres the deal. I hooked up with this kids EX girlfriend over the summer and i guess this kids a total tweak job about everything. He's been threatening me since he found out which is about a month and a half now, and first day of school rolls by and he's in my 7th period class. After class, he chokes me up against the wall, starts saying shit to me n stuff and i dont say n e thing back. I walk away and he hits me in the face fuckin hard. He just threatened me again and this kids probably the scariest kid at our school. Im scared outta my mind and i dont know what i should do. My friends know about it but my parents and no adults do. no teachers saw this happen at school, but i dont know what i should do. I've tried talking to him and having his friends talk to him and his ex gf, but nothings worked so far.


Hopefully you guys have some advice cuz i dont know what to do and im scared outta my mind

p.s. please give me some real advice not shit like carry a gun etc