I opened up to my friend about my eating disorder and he ignores it?

I told him about my eating disorder about a year ago (only person that knows) and he encouraged me to get help, but he also said he would be there for me. And, we vent to each other a lot about our problems (he used to vent to me about a drug problem, and i would listen). Recently whenever I bring up my ED to him, just to talk about it, he will only say "im sorry" and then either stop talking about it or change the subject. I really need him right now because im relapsing bad, and i come to him with this today and he ignored me. Im honestly pissed off.. What do I do? Not bring it up to him? or confront him?