Anorexia is a disorder where you continuously don't eat or eat very little day after day until you become ridicolously thin. Bulimia is where you do eat normal amounts of food but you force yourself to be sick after the meal so you don't eat any calories.
Yours doesn't sound like a specific eating disorder but you could be ruining your body. You have to try and eat regularly each day. Even if it's just small amounts.
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If I could hold a star for everytime you make me smile,
I would have to hold the whole night sky in the palm of my hands.