"Both abusers and diet culture isolate you from friends and family. You can’t participate in family dinners or visits to restaurants or meet-ups at the local bar or birthday celebrations unless you can fit the food into your “plan.”"
My mother had an interesting twist on this. When she was on one of her diets that lasted for years, she would insist that she could not eat certain foods.
At every single holiday meal, I had to prepare for her, and then food for everyone else.
Wouldn't you know it, she alwasy ate from the food for everyone else. For her, the diet was simply another opportunity to put herself at the center of the universe, and literally steal my time.