Quote Originally Posted by roadie gal View Post

I got home on Friday. Last night I get an email from her saying that I made her feel like her life wasn't worthwhile and that she was very depressed.

WTF??????
Could be what she meant was that the things you said made her think about whether her life was still worth living, and of course that is incredibly depressing to think about. I wouldn't assume that you made her feel that.
People in her situation are a huge mess of mixed feelings. I'd be willing to bet she felt some relief in being able to confide in you about how truly hopeless she feels. She has been through hell and back. Tell her how you feel right now, and let her know that anything she wants to talk to you about is ok.