My exgirlfriend is mad at me... very... why?? i need help!!?

my ex and i broke up 2 weeks ago.. i broke up with her bec i listened to my friends that she makes me look stupid... after i broke up with her she said my friends won again.. take note, this is the 5th time that we broke up.. i told her that she was a user when i was drunk.. she got really furious with me.. well duh.. then after a week, she embared me by saying that im gross in front of the whole office. i then told her to get over it... she then slapped my face 5 times and said things.. she said i am saying bad things about her to our friends and co-employees, which i am not.. i told her to stop bec we're finished, she said she could not just let go of everything that i did to her..and again, slapped me.. good thing our friends stopped us. now, she is still angry, she is saying that she is not yet done with me.. i still love her though... but our relationship was not healthy and it is not working... we're both 23 yrs of age.. i keep on telling her to get over it, but still she wants to hurt me... what should i do to stop this??