HELP!!! THIS GUY KEEPS STALKING ME

Karen

if you guys have experienced this or are rn, I would highly appreciate your help. But here's the thing, this guy (we'll name him cole) has been wanting to date me for the longest time. He has tried multiple times to break me up with my boyfriend. He has threatened other guys that find me attractive to kill/beat them up!! He constantly tells my boyfriend that I'm his (cole) and not (Robert my bf). I don't know what to do. School recently started again and hes back at it again. Could someone please please Please give me advice on what to do???? This guy has given me so much anxiety to the point where I'm constantly paranoid!!