How do you apologize to someone that never wants to see you again? I don't have a good answer to this question. You could send a crd BRIEFLY express your thoughts, feelings and emotions and leave it at that.

It sounds like she may have not been the greatest friend afterall since she was so willing to cut off contact with you so quickly. Or, perhaps she really had feelings for you and was trying to maniuplate the situation. Who knows? Give it some time.