How do i get over him?

my boyfriend broke up with me a while ago and he was the first person i slept with & i'm finding it really hard to get over him, i tried the usual stay home with girlfriends dissing guys watching movies & eating chocolate ise cream & other types of junk food but that didn' work, i've started smoking, i drink more than i used to, i used to cut myself, i've had one night stands and i feel like i've tried everything to get over it but i can't.