Eating Disorders Support Group
Eating disorders are marked by an obsessive need to control the intake and/or purging of food. This community is dedicated to those struggling on the road to recovery. Join to discuss your experience with others and find support. Get advice, ask questions, and meet others who are going through similar struggles.
Remember that someone can be a good person, but be harming you. You have the right to set limits about what conversation is appropriate. You have the right to say you will be supportive, but not spend time with your friend if it's hurting your recovery.
It sounds cliche, but if she's a true friend, she'll want you to succeed.
Perhaps even arrange to have someone call you when you know you are going to be with her to see how you are doing and give you a potential out.