I've messed up a few times in a friendship with someone. Let my emotions get the better of me. But I really care about her, and she has a good influence on me. I feel absolutely terrible about what I did. It eats me alive. I can't sleep, I can't eat. I spontaneously start crying. This person is so important to me. She's very adamant about her rule of "three chances". How can I convince her that I'm worth making an exception for? I've done so much for her and I expect to do so much more for her.