Dear Amy: My best friend suffers from PTSD and other mental health issues, and has been suicidal. This has been a particularly tough year for her, and she pushed away several friends after they hurt her, leaving me as one of her only remaining confidants (she isn’t in touch with her family, for good reason). We would text or talk daily, and she lives close to me, so she’s a huge part of my life. A month ago, she was having a bad day and I tried to cheer her up by saying this year would be a lot better than the last.