It's great that you have so much acceptance in your heart, honestly. But here's the problem. Friendship has to be a two-way thing.

She's unilaterally declared friendship on you!

Just because you were there in her hour of need doesn't mean you have to be stuck with her until she deigns to let you go.

I've faced this myself. Truly, you should have a brutally honest conversation with yourself...

You don't like her!