Am i anerexic?????

ppl think im anerexic because i eat every several days but i mean i cant help it have to feed my lil sibs. and my parents and i just forget about myself. and when i tell ppl that im not they ask "well when was the last time u ate?" and i always say "idk". and now my bf is starting to worry he says that he wants me to eat more because im hurnting myself and when i say that i kno wat im doing and im fine. he says that he's worried about me and doesnt kno wat he'ld do if i was hospitalized because he couldnt help me. i eat everyweekend but during the week i drown myself in water. please help!!! im worried about this and do u think it could cause my bf and i to break up? please i need help ppl!!!!! {btw im 16 and take care of every1 in my family and pay all the bills by myself....could it b stress that is causing me to forget about myself???}