Trying to talk her into being happy or reasoning with her isn't going to help, she WANTS to argue the negative...
if she has depression she is going to look for any opportunity to reply negatively to what you offer up...
The best thing to do is invite her to keep the commentary constructive like i suggested OR project a positive energy and ignore her commentary completely...
engaging the negative commentary or reacting to it is not going to help you I don't think...
You have to gauge this fully, we can only make a rough assessment here from th forum i'm afraid...
