I just can’t seem to make myself eat alot

I have suffered with body dysmorphia to the point where I dropped to 7 stone because I did get bullied for being the ‘chubbiest’ out of all my sisters at a young age and it became an obsession and that’s when I got diagnosed with BDD but now I’m doing ok I guess and I’m 9st 2 which is ‘healthy’.

But I’m dropping weight again because I can’t bring myself to eat more than 400-500 kcal per day. I feel physically sick if I do.

I’m starting to worry bc I feel fat again like I have a little belly roll my thighs almost touch and I’m worrying it’s me spiralling again like my mind is making me lose weight because it’s telling me I’m not hungry but I’m feeling tired fatigued etc so I know my body needs it

Why is this so hard it’s like an actual battle with yourself 😞 what can I eat that won’t fill me up so fast but is enough kcal so my body don’t go into survival mode