Hi! This is your first post so welcome!

Speaking from someone who is bipolar, people have just blocked me and cut me out of their life. That's how they have dealt with it, and it made me feel horrible!

But I agree with Skeezyks in that you have to set boundaries and let her know you are moving on. And just leave it like that. If she doesn't leave you alone, (which she may not) you may just have to pull yourself away completely. It is frustrating I know, but if she needs help and is not doing anything about it, you can't really do anything aboyt it.