This is a female's fear.
I never doubt that because it's certainly true.
Every girl is beautiful but it takes the right guy
to value that :)
In any case which you have a boyfriend that
prioritizes your beauty and prettiness more than everything
and his decision make you turn to be an anorexic and not being who you are;
just forget about him.
because you do know you don't deserve anyone like him
and you deserve someone better that can accept you the way you are.
ps, as for boys, it will be the same case scenario i think.
YOU CAN HANDLE THIS :)