What's the key to letting go of emotional eating? As much as stress, anxiety, and loneliness can make us eat beyond our needs, happiness can do the same. Just because we're too relaxed, we might end up eating a lot more, drink more, and do less training (if any), and so on.
When sadness kicks in, I still feel a lot more comfortable when it takes a shape and I can get in touch with it, asking for its name, its origine... It tires me a lot to be blue for no reason.