I was doing well in recovery from anorexia for a year and a half but I've been slipping back down that rabbit hole and I don't want anybody to know.
I'm sorry this is happening. Why don't you want to tell anyone?
I'm mortified  to tell my mother I've fallen back in the trap.
It is fine to tell others about your own problems. The advice and support they give can help you get back on track.
I'm scared, I don't think I can do this.
You can do this and you did it the first time. Reaching out to others for help will be good for you. You will need the support if you are going to make it through again.