Hi Zep.
Throw away the packets so you cannot divide into smaller portions. Try cooking for yourself from scratch. Try something ridiculous for breakfast. Do not think that certain things can only be eaten at defined times of day, To start go for the tastes you like, sweet, sour, savoury, salty, creamy. The colours you like. Pink shrimp. Red beetroot. Green peas. White rice. Get the idea? The textures you prefer. Liquid, soft, crunchy, hard.
Eat a teaspoonful of something. Then perhaps a teaspoonful of something else.
It may be that you feel that the only area of control over your life is whether or not you choose to eat .
Find someone to talk to about this. Yes, you have a problem. No, it is not insuperable.
Keep in touch. Best Wishes.