My mother has been very clearly sad lately. She hasn't been herself and that is to say that she hasn't been doing the things that make her happy, she hasn't been cleaning, she hasn't been taking as good care of herself, and she often seems to be holding back a great deal of emotion whenever we speak. I have tried asking her if she is okay, but she always acts like everything is fine and fakes like she is better for a short time but returns to being despondent quickly. I really want to help her, but how can I get her to talk to me?