Really need help, being threatened! Teen help needed?

[helena]

Okay so this guy on facebook started talking to me, like loads and loads but he's so annoying but i feel bad for ignoring him. Anyway, i asked him what his Bbm pin was, and i asked to play 21 questions. I told him who i liked and who i've been out with. I didn't really want to tell him but i did. So anyway, yesterday there was an argument between him and this other guy and i was being kinda mean to the facebook/bbm guy (lets call him bob). So anyway Bob was mad at me and he kept threatening to put a status about it and he had it all typed out and sent a pic about to post it AND HE TAGGED ME AND MY CRUSH IN IT! But he didn't post it but he keeps threatening too. So Bob copy and pasted the convo about my crush and pasted it to me on bbm and said he was meant to post it somewhere else:O:O:O so i keep begging him not to and asking him to forgot about it but i don't think he will. So i don't want to block him cause he will post it or tell my crush but i don't want to keep talking to him cause he's annoying. WHAT SHOULD I DO? I'm talking to him now and trying to be nice and that but i'm worried. Help please