Stalker... please help :(

I’ve been being harassed by an ex friend (we tried dating for a little while like 2 months but didn’t work out). I’ve finally summoned the courage to report it to the police because he has began to harass my friends and partner. this has been going on for years but I really feel scared now that he is going to come after me for revenge. Have I done the right thing? What can I do to make myself feel better :(