Close your eyes. Remove everything that is stressful on your mind. & Just relax.
Friendship is a strong bond. You were able to hold on to her and care for her, at her worse. That's unconditional love. Although, communication is key. Talk to her, tell her how you feel, and if she doesn't understand, take some time apart.
Take as much time as you need.
Then when the time is right, take baby steps, into building a new bond with her.
I don't believe you should end your friendship this way. <3
Idk, this is just my opinion. I'm no moral judge of what makes you happy.

Good luck!