I don't want to sound insulting in any capacity, but this is totally typical. In fact, so typical, it's by-the-books kinda stuff!
You latch onto a specific criteria for intake and outgoing. Through a carefully-crafted, channel-like process, you eradicate certain foods and drinks, and completely narrow your outlook on what it is to "eat".
Eating no longer becomes fuel or energy, it becomes this arbitrary commodity. You forget taste, you forget experience. All that's left is units, numbers, calculations.
Tell me if this sounds unfamiliar: A man goes out with his friends. He drinks eight pints of lager, then staggers to the kebab shop and has a portion of chips with Donnermeat and sauce.
Yeah, that's unfamiliar to you, right? Let me rephrase.
A man spends the entire day fretting about going out. He'll have to eat and drink. He'll be taking in all night. Does he abstain all day to make up for it? Does he write off the entire day as some kind of nightmare day?! He goes out. 210. 210. That's 2 pints of beer, and that makes his intake 1420. 210. Holy crap, this is getting nuts. I'm consuming a normal amount of calories soon. 210. I'm drunk and I've had 1840 calories but now I'm hungry and inhibited. This is what I feared. What do I do?! The eating disorder still has a hold on me, so even drunk, I know how to beat normality. "I'm okay, I'm not hungry", you say, as everyone else gets chips. "Can I have one?" You ask, counting 30 for every chip you take. When you wake in the morning, you think, you can at least go to the gym.
You have eaten less than the majority of people in the world, yet you believe you have spent the day failing.
The first person sees the best night out ever. The second sees merely failure and heartache.
There is no "normality" other than that which you believe yourself!