HELP!! My female friend is behaving so strange. What canI do?

i had few arguments & fights with my female friend in last 2 weeks, she said some rude things to me & i also said some rude things to her. i was before in love with her, but am not anymore. but i still wanna talk to her, esp. since we r working in same company. y'day i told her she has many guy friends, so even if she loses one, it wont make a big difference to her. both of us said rude things or behaved bit rudely to each other. i was hurt when she behaved badly to her, but i forgave her, i just wanna keep a normal relation with her. but since i said that y'day she is not talking to me, she blocked me in chat, she's not taking my calls, i even messaged her to say i am sorry & asked her if we could talk or be friends again. I met her randomly at pantry in office & she told me I have to first learn what friendship is. I think she is overreacting & being too harsh- if she considered me as friend, wouldnt she forgive & start talking, esp. since I apologized & also she was rude to me. What can I do? I was very close to her, I just want that we atleast speak normally.