My ex-best friend hates me now? What do I do?

Here is what I can tell you about best friends. If she is truly your best friend, then she should forgive you no matter what the case is. Obviously that is not the case. So I have had the same best friend now for a little over 20 years. We've been through a lot. If I were you, I would act like it's not bothering you. Move on, continue with your life, have fun. She will see what she is missing out on. This happened between me and my friend. It took over a year for her to start talking to me again, but we are still BF-Fs. It's tough, but you have to be tough. Don't let it bring you down and hurt you so much, that is what it seems like she is wanting since she is feeling betrayed by you.