Seizure-Tastic
Kironiko
My older sister is like my best friend so I don't personally have that problem...but the adive that I can give is that you should talk to your friends and your brother...ask them who they prefer to hang out with, and then confront your brother about how you feel.
I've told him it pissed me off because he's basically showing my parents and my grandparents that he's a bad influence. And they only hang out with him because he has a car and none of them do.
No offense but it sounds like you need better friends. I know that sounds mean, but if their hanging out with him because he has a car...I mean come on. It will probably be difficult finding new friends, but trust me, you'll be a lot happier in the longrun okay?