I am seeking diet help?

this question will seem stupid, sure. i am on a diet, and some friends brought over pizza, and i didn't eat any. they would up leaving half a pie. and i wanna eat it pretty bad, but i feel like yeah its not gonna kill me, but I've only been on a diet for 2 weeks, im not starving myself or anything, im just eating cleaner foods, without lots of sugars, salts or fats. i was gonna make new york strip steak with airfried potatos for dinner, and im just wondering from anyone who knows, how much worse is a lets say, 18 oz steak and maybe an entire potato than pizza, or visa versa, part of me may be fishing for an excuse to eat the pizza aswell, so say it how it is.

Updates
+1 y
also forgot to add, i haven't eaten since maybe 8am, where i had maybe a half a pound of chicken on some toasted wheat bread
I am seeking diet help?
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