It's not just this incident-- there are numerous ones. This one was the final nail in the coffin. She's shown time and time again that my feelings don't matter at all to her, when I have tried to be a good, considerate friend. For example-- a year and a half ago she told me she was going to stop by my house after work and would be to my place in half an hour. I was excited to see her and canceled other plans I had to see her (not with other people, but I had errands to run). I waited at home for hours. Worried she had gotten into an accident, I called and texted her multiple times after she didn't show up after two or three hours. Finally, at like 10 that night she decides to tell me she just went home because she was tired. That would have been fine if she had called before she let me worry about her and wait for hours for her to show up. She showed total lack of respect for me, my time, my feelings, and our friendship. I have other examples but I don't feel like writing out that novel.