My parents didn't confront me about my E

My parents didn't confront me about my ED until 3 years ago. All of this started for me almost 18 years ago. I don't know if they didn't know, or if they just didn't want to see it. I never became emaciated, I never threw up or binged, so how would they really know? I didn't share my feelings with them, still don't, so there would be no way for them to know. I remember sitting at the dinner table almost 3 yrs ago when they confronted me. It was awful. I never really said anything but did say I would go see someone. We never talk about my ED and I've never told them that I have one. Those words have never been spoken. They know I go to therapy but that's about it. I don't talk to them about anything and hate when they ask me questions about it. I hate that they worry and I saw my dad cry like a baby when I told him I'd go talk to someone, which killed me, but I also don't want them asking me questions about anything. I just wish they didn't have to worry about me. I just babbled on about nothing.