I am sorry I read your first post wrong.....my post was based on my wrong reading. Reading it again, I am not sure what to say......not sure what her illness is, that might be causing her to make poor judgements. It the long run, it sounds like you might be just better off without her.....& that isn't something easy to do when you have been friends with someone like that.

I know the best friend I had all through school & college & until we got married has just never responded.....our families were also close & never knew how her mother ended up doing & couldn't even get in touch with her when my Mother died. Sometimes we just can't make relationships work....sometimes it is just better to let go. Some people need things to be on their terms & when they have problems, sometimes their terms aren't rational to what normal people would expect. Letting go of our expectations is tough too, & is has to be nice to have close friends.

Hope you can work things out for yourself to be ok with,
Debbie