PERVERT! ANYONE HELP!?

OKKKKKKKKKKKKKK, i was talking to one of my freinds, ( hes like 30 or something aand im 16) he asked me for my number and i gave it to him, cause we were freinds. he also added me as a freind on facebook and i said yes cause we were freindS in real life. so after a while things got creepy like he started sending me really nasty pics and started fowling me home from work.hes also been to my house beforE cause my parents were out of town. he thought "i might be lonely" and even if i was i would've called my boyfreind not him. no one belives me when i say he's a pervert. PLEASE HELP!