People who went on no sugar or no outside food challange. how?

So i live in hostel in 22 and i have developed this real bad habit of eating out 3-4 times every week and ordering food at 3-4 am. i can cook so I'm usually full by 8 pm with stuff i make but even after eating allat i still get hungry at 2 am

how do i stop it? my main reason is to not go on a cut and lose my frame but get my face fat down and get a clearer skin so how?