DEAR HARRIETTE: I was skinny for most of my life – uncomfortably so. Then I had my son, and I gained a lot of weight. It has been more than 20 years, and I have yet to get back to a slim size. To be honest, I am overweight. I feel like I hated how I looked when I was younger because I was too small, and now I’m shy about how I look because I’m too big. Yes, I see that I have some body-image issues…