[floatingangel]

hey hun.. i know how hard it is to feel helpless when a friend has an eating disorder and just can't seem to be free of it.. and you're a great friend to be so concerned about her. (:
firstly, as the two above have mentioned, this is mostly her war. although you can be by her side and show that you're accepting of whoever she is no matter what, there's a limit to what you can do. try not to advice her on anything, just listen. the hospital can be intimidating and all, but keep on hoping that she can get better and that even though it'll not happen as quickly or effectively as you think it will, don't give up.
secondly, you've to take care of yourself as well if you want to be by her side. make sure that you yourself are strong that you've someone to talk to when things doesn't seem to be going well. if you can, try researching on eds to know more about them and also what to or not to do in front of your friend.
take care!