My roommate is exactly the same way. No matter what I or anyone else says to her, she is secretly happy or crushed depending on how it makes her feel about her eating. I know it is so hard, but no one should be able to make you feel better or worse about what you eat except for yourself. I am the same way...it took ME having a very tough moment of realization to realize that I am the only one who should impact my eating. I almost have to get angry with myself..."Why am I hurting myself...who is it for?" YOU...have the power and you can change yourself. You've seen for yourself how damaging you can be to yourself but also probably how much disipline you can have when it comes to eating. Don't be terrified of food...think about that? That is sad...I have gone through this too and you must learn to channel your amazing will-power (that you now use to hurt yourself) in a good way!!! You can take care of your body by learning to eat the right foods!!! Do you know that to lose weight the healthy way you actually have to eat more? Its great...the "right" foods of course...
Anyways....sorry I kind of went off on a random ramble myself, but when I read your post my heart ached...I remember this and I see it everyday in my friend...I have let go and you can too!
Here are some of my favorite mantras that helped me...corny...but they helped.
"No one can make you feel inferior without your own consent" E. Roosevelt
"Life is a banquet, and most poor suckers are starving to death" - unknown...
Don't starve youself...life is so much more than that...
Sorry for the ramble...I hope it helps...