I am not anorexic but I've been a binge eater almost my entire life (decades), so I totally understand how wrong it is for others to say "just fix it". If we could, we would! Having an eating disorder of any sort is not anything a person would hope for. It's a way of coping that becomes totally out of control. My only suggestion to you is to NEVER give up. Our families can't possibly "get it". They love us and want us to be healthy, and food seems to be something that society feels (and rightfully so) we should eat with balance.
That we "choose" to eat too much or not eat enough. They don't understand the internal struggle that's always there, and the hatred for ourselves that is underneath it all. That's what good therapy is all about.