Love breakup and girlfriend is blackmail me

2 years back I proposed a girl and she accepted me after 4 months from my proposal and after that we went everywhere in our city and did so many times kisses and hugs and body touchings but not intercourses after 1 year she is not good at her behaviour and she always acts like a sadistic and she always keeps me riled in my life , like I should not talk with girls and chat with them , I should talk with my best friend and I should not talk with my school mates like this when she keeping all these I get hated her and I said her breakup she to said me ok fine breakup But next morning she always text me and message me and calls me everyday and says that I can’t leave u and after that she did roming with boys and girls to different different places in this mean while one day she and I came to one place to satil the mater at that time we had a intercourse (fuck) after that we had in 4 months nearly 9 times but it all done after my breakup from her and she said me that if I give u fuck May be u can come back to my life so that’s why I gave u fuck . After all these middle I am talking with my school mates I had a girl in my school mates she is having a great heart so I and her met in love all this matter got to known my first love after that she done so many tries for breakup my life with her she did many efforts to break me up with my new gf by seeing those I said I left her but internally I didn’t do that and don’t no upto now and she is asking me to love her I said I can’t do that at that time she had my Facebook id by taking my id she texted every girl abused words and deleted chats and blocked them from that moment I am not even talking with from there now it is 1 month is messaged me and saying me that if u won’t be with me I will say everything to ur parents and police and yesterday night after blackmail me she said that give me 60k I will leave u so that should I do now ?