Distancing is a common method of coping with high stress, and I'm sure she is feeling quite a bit of stress. I would suggest that you give her the space that she needs while showing that you still love her and care about her health and happiness. If you try too hard to smother her with attention it may only push her further away. It takes time to change for the better, so allow it.
It's good to see you posting at SR and I also suggest you check out the Friends and Family forum here.