I think it would be good to take a quiet moment and tell her again how grateful you are for her caring for you when you were not able to care for yourself, and that you'll never forget that. Tell her you are so glad to have moved past that because it was such a difficult time. Tell her you like to focus on moving forward.
Let that sink in - it was in the past, you are grateful, but it needs to stay in the past.

Then tell her that because your friendship is special, you need to talk to her about some things happening now, that are very hurtful to you that just can't continue. Ask her for her help in how to change what is happening. It's possible she just doesn't realize that the things she says are so hurtful.

If it doesn't work, then I would then consider shifting your friendship so there is more distance between you.