at scool he was trash talking 2 me, then he told my classmates that i did crap 2 him9but i did nothing) and then he went wayyy 2 far by hacking my Facebook profile
Hacking a facebook account isn't really a big deal.
You can do two things, speak to him, or brush it off and ignore it. It would be fairly trivial to try and "get him back".
Both options are pretty easily done.