Here's what I think about your sitch. Your W wants to feel valued. She wants to be shown that she matters. That what she thinks matters. That what she feels matters.
I think she's trying to reach out to you in little ways but is afraid of how you'll view her and she's afraid to seem weak.
So my suggestion is that when she seems sad or lonely, just give her a firm hug and when she asks what that was for, just tell her that it looked like she needed one and then just walk away as if it was no big deal.
I would suggest doing little (very little) things for her that give her the impression that you're still around but allows for her to do her own growth.
So when she does something that she's proud of, tell her that you're proud of her and it must make her feel good for doing it. Build up her pride in little ways. Think of it like trying to steer a massive ship. If you turn the wheel too hard it will tip over. But if you do little turns along the way, it will turn smoothly around.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.