What can i do this person keeps making fun of my depression?

this guy at my school keeps making fun of my depression and he keeps saying stuff that i put up on my blog because that is my way of copeing with my depression cause no one listens to me so i put my emotions on there so i can read them and get advice from people around me. the other night he put a comment up saying that i needed a razor blade and that im no man something along those lines but there was more but its too bad to put up here. he keeps making fun of me he tried to front up and threaten me because i told him to piss off now he wont stop the crap what can i do?