Or maybe she was depressive and actually felt like she wasn't worth your time - spoiler warning, depressive people don't think they're worth anyone's time. I mean, I can't know what happened when you describe it in such a neat, summarized, bulleted list, but it does make me think you handled it in a neat, summarized, bulleted manner.
I think I remember you, by the way.
This is what it probably was. I honestly did anything and everything I could for her but she continued to fall away and I was at a loss for what to do.