My Best Friend(now ex best friend) is mad at me. What should I do?

Okay, it has been like a month and a week or something since this happened: I was talking to her and she said something and I admit I overreact a little TOO much sometimes so I called her a b***h. I texted her like 3 times with big paragraphs saying how sorry I am and how she has helped me through so much and I dont want to ruin our relationship. I also messaged her on facebook and when she asked a question about her dog on Yahoo Answers I said I was sorry again and not to seem rude also answered her question with detail. You are probably thinking " wow...she is desperate" and I know I sound desperate but I am about to give up. I am just trying to fight for my friendship here. In high school you develope alot of friendships and lots of people end up losing them but Taylor(the one i am talking about) is really the best friend i have ever ever EVER had!!!!! i dont know what to do. and on top of all that i moved an hour away. she also hasn't spoken to me since we had that fight. please help. what should i do???