Why aren't my parents stepping-up?

I understand what you are going through but it is not easy either way. The problem is not your parents but your sister. It sounds like they are enablers but even if they were not there is no magic that is guaranteed to work. My son is way way beyond your sister and my daughter is like you are. They are 18 months apart and were only one grade apart in school so they had a lot of friends in common. Somehow they could go to the same party and yet it was like they were at two totally separate ones. We have tried everything imaginable to help our son for 13 years now and nothing has work. At first she blamed us and in one memorable emotional outburst blamed us for taking her brother away (he was in a juvenile treatment facility). Now she bad mouths him and says she wants nothing to do with him but every time he gets out of jail it's like they are the best of friends again. If your sister has done heroin the anti-anxiety drugs may be helping her to deal with her cravings for it. I know it may sound cruel but you need to take care of yourself and not worry about your sister because you can't change her. I suggest you check out Alateen (addiction is addiction) a href="http://www.al-anon.alateen.org/english.html" rel="nofollow"http://www.al-anon.alateen.org/english.h…/a and know that your parents really do love you.