I can't read her mind, but I'm wondering if her reminding you to take care of yourself is due to her thinking you're not writing back because you're in an episode. Maybe she thinks its bipolar related and hasn't realized you're not returning her messages simply because you no longer wish to speak to her after what you went through. Thinking you're ill would be easier to swallow than admitting she messed up.

I don't want go further muddy the waters here, but it crossed my mind.