I was in a relationship like that, we were both codependent. I remember reading the exact quote that Thumper posted and thought, "Yes! That's us in this relationship!"
We nearly destroyed each other.
I second tallulah's House episode example. That IS healthy, for each person to take care of themselves. I've begun dating again, and am seriously working on finding that kind of dynamic, or will choose to be happily alone instead. I'm too weary to get back on that merry-go-round again. And I suppose that's the "up" side of fatigue.
posie