please open up to your therapist , let him now what is going on. I have had and eating disorder for such a long time. I hid it for such a long time. and I destroyed my life. my health and my appearance. and my relationships.. now I think, my sister has one. and is hiding from me and I so desperately don't want her to go through the same thing. please, you don't have to be ashame. you wouldn't be ashamed if you had any other disease , its a disease. that's how I feel.. your sister loves you. she wont judge you. your therapist wants to help. you.. I don't know if you have figure it out yet, but your bulimia is what is helping you cope with something you cant cope with in your life. took me forever to get that into my head.. still there are times. I just think its about the weight.. please, talk to your therapist be truthful with him. and talk to your sister. even if its writing her a letter. she loves. you.. she will want to be there for you.. with whatever way you will let her..