My father died three years ago after 53 years of marriage, and my mother is still depressed and grieving. She has severe arthritis, so she's frequently in pain. She complains about how she's "down and out," how lonely she is, how she doesn't feel good, etc. It's a constant stream of negativity, and it gets me down. I feel helpless because there's nothing I can do to change things for her, Today I was talking to her on the phone, and when I tried to change the subject, talking about extended family and other topics, she said, "Everybody else is more important than me. You talk to me like I'm a stranger." I'm at a loss.