Can you please help me i dont know what to do

UPDATE

Ok so I blocked and reported him for the a millionth time at first he kept making accounts and telling me rude stuff like I was a slut and a bitch etc I kept blocking and reporting after 5 hours he finally gave up

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So their is a guy I know and he always text me and I find it annoying i try to block him but he makes a new account and gets angry at me but honestly it's stupid like I won't answer his text or won't even open his Snapchat and a minute after he sends it and he goes of at me I tell him that i have really bad reception and stuff because I do were u live and he makes me feel bad and I try to get him to leave me alone but he threatens to kill himself and gets really mad and starts calling me names and stuff I have been working on myself alot because blast year I was depressed and suicidal I have stopped cutting I'm eating 2 meals a day and have been happy I don't want to relapse