It is very frustrating hear people refering to "healthy eating" and "being on a diet" as the same thing. Changing your eating habits so that you are consuming foods that are more healful does not mean that you are "on a diet". A "diet" implies food restriction and deprivation. Eating healthfully is a lifestyle change and means eating a wide variety of foods. These foods do not have to be boring or taste badly! I don't understand your aversion to vegetables or "anything good for me". What do you define as "anything good for you"? Did you know that all of these foods can be good for you: fruit, yogurt, whole grain breads (and bagels, tortillas, english muffins), oatmeal, whole grain cereals, peanut butter, peanuts, almonds, almond butter, lean meats, eggs, fish, cheese, beans.

For example, a peanut butter and banana sandwich + yogurt + a few crakers with cheese is a "healthy" lunch!

Clearly you are thin and do not need to lose weight. Do not try to restict your food intake. Do not think of yourself as "on a diet". Try making some small changes in your food choices at first and gradually work up to more healthy choices over time.