its not physical illness, its a complex eating disorder that does what it wants, i find it easier to just call myself a snacker instead of a meal person.
my parents "didnt let me eat", thats your brothers dont touch it bs, food running low after a week (out of 2) because stepfather needed his 12pack and they both needed their weed, so i refused to eat to feed my brothers, didnt eat lunch at school because i was embarrassed to, plus mother refused to stop making me lunch after gr6. and my first "attempts" (if thats what youll call them) was by starvation, and accused of stealing food in my own house (that i didnt even touch. who even knew you could steal food out of your own home, that one was a new one on me)
so yeah all that over the years kinda fucked up my eating habits in a bad way. and i often skimped on breakfast and sometimes supper (but that was more rare). when i did eat supper id hear "you didnt eat everything so you dont get dessert" at this point i was literally, im gonna throw up stuffed and because whoda thunk it people digest food id be hungry again in half an hour but because i didnt eat all my supper i must be full so i was refused food for the rest of the night (at which point i did start "stealing" after they went to sleep because fuck you im hungry)
to answer your other questions, years and i dont fancy anything but sometimes (like now) its to the point were i feel nauseous. sometimes even eating itself can make me feel sick and i need to take an anti nausant thing