Well, Non of your friends, school, teacher wont help so you have to gather up evidence that it happened and show it to the distract if you don't do that the boy will win!! How to gather up Evidence keep your phone somewhere and start voice recording everything all the school hours don't just do it for one day record it may be 3 times gather up more evidence not sure but I think you will figure it out! :D don't do anything stupid it might go against you!

this might help you!

:D