IMHO, you can take the approach of tough love with a kind heart. She chose to no longer be part of the family. She no longer has the right to concern you with her concerns. You can draw the line or this. But you can be kind about it.
My WAW has been the same way. Upset at every little thing I do or don't do. I can not worry myself over it. I will smile, make decisions that make me and my daughters happy and enjoy life. I am still respectful to her, greet her with a smile and kindness and I do hope for the best for her. Just my thoughts.
Me 46 Former W 46 D19 D7 BD Feb 2016 WAW moves out 4/16/16 D final 6/1/2017
It's time for me to start changin' the way I look at the world......and at myself. ~James Howlett aka Wolverine