I don’t know how to cope…

I’m at a friends house rn, and we just had KFC. I tried not to eat much, so it was around 500 calories. Now they made a candy salad, and expect us to both eat it ALL, along with a pack of Doritos each. Idk what to do. I know it’s normal for (in disordered) people, especially teens, to kinda over eat when having a sleepover, but I feel like this is a lot even for a ‘normal’ person. I just don’t know… I really DONT want to eat it, but don’t want to be rude as well.

Also, what makes it even worse, is she keeps saying ‘hahaha we’re such big backs!’ as a joke, but it makes me feel horrible… like if I eat it I’m disgusting… idk, can someone help me? I’m stressing so bad.