She sounds like a sweetheart, so if I were you, I'd let her be. Some people are better left to what they are familiar with, what gives them hope and happiness and it seems as if for her that's the organisation, so if it were me, I'd let her be happy and content with her life.
Are you DF or just fading away? If DF, then I think she came across with love and concern for you, which is alot more than what some who are DF could ever hope for. If you're just fading, then she is probably keeping the lines of communication open in hopes you'll 'come to your senses'. Either way, I'd be inclined to just tell her you love her and let it be