Some people cannot express themselves in writing about difficult subjects. Think of writing about our lives here and how that can be upsetting or scary, difficult to express in words that make sense?

I suspect some people see DID more literally than others, in a kind of spirit possession sort of way rather than as a splitting and to put it in writing in a way they understand it, would make it too real for them to deal with. I think people who do not understand eating disorders, DID, suicidal ideation and other major problems often think of them in a magical way, like they are contagious or that talking about them will make them more real. Regular people are not immune to distortions in their thinking and can have leaps of imagination that make the "Body Snatchers" a possibility.

I imagine your friend is a "wimp," freewill :-) not particularly "bad" or deliberately hurtful. She probably sincerely believes that if she talks about your problems and puts them in writing it will make you worse in some way, make what she sees more "real" rather than what she imagines. She'll have to believe these things can happen and if they have happened to you, maybe they could happen to her? It's a lot to ask from another person. They may have problems themselves with just asking for help and your asking for help might be triggering them in such a way they can't help you?