Dear Jane, I am the mother of a bright, beautiful, friendly 15-year-old who I love very much. But in recent years, a pit of jealousy has started growing over just how talented and popular my daughter has become. I have spent much of my life feeling little more than average. I’m not ugly – but I’m not pretty. I’m not dumb – but I’m not what you would consider intelligent. I have some good friends – but popular is never a word someone would use to describe me. My daughter, on the other hand, is spectacular. She has an enormous...