Jesternutter.....my guess is he's scared. He doesn't understand why you binge, why you don't see the danger. He wants to do something, but doesn't know how to get through to you. He fears for you and for himself.
Help him understand. Let him know all the steps you are taking to get sober and that you know the bruises and binging are dangerous. I know you've said...show it though because he probably won't believe you.
"Normal" people don't understand alcoholism. Communicate and give him some time and patience...