To tell or not to tell? | ADHD Information

Its a tough decision for some, I had to think the same thing for my boyfriend and sister. My advice is do it. The support I got was worth th anxiety before hand! I'm considering telling my sister about my ADD.  Not quite sure why.  I guess I just am seeking some acceptance and my younger sister has always been more accepting of me than my other siblings.  I still am having a hard time accepting ADD for myself and I guess I think if I tell her, she'd understand all the "why's" in my life and then I'd have a family advocate.  But....it could all backfire too.  I've read and even posted about not disclosing but I'm just confused.  Decision-making is so hard for me.  Help?