Well, I finally heard back from my friend. I'm not really sure how I feel right now. Let's just say her reaction didn't immediately make me feel better. She did apologize, but she also gave some excuses and basically told me that she didn't have time/energy to put much more into our friendship (although she really values the time we spent together in grad school and the support I gave to her in her time of need).
I don't know. I think I need some more time to process... I still feel much of the hurt and bitterness I felt before. I don't know if it is something I can work through and be friends with her, or if it is just too much for me. I don't know.