At times of stress and loss we crave calorie-dense foods. That's what our bodies are designed to do. Don't beat yourself up. You have sadness in your life that you have to deal with.
Maybe you can try some other comfort foods. Soup is really comforting and is often lower in calories than other options. Tea helps, too.
Try to exercise, if you can. It helps release endorphins, which may make you feel better. And also may give you time to think things through.
"There's treasure everywhere." Hobbes, in Calvin and Hobbes