Hi Katie, I get why you’re worried, because you care…. but your fears seem a little irrational/catastrophic. Just because some teenagers engage in these things definitely doesn’t mean they all do, whether they’re outgoing or not and whether you did or not. Every one is different. It’s just as likely that your brother will choose not to, especially if he has a good head on his shoulders and if he has a good group of friends… and even if he gets in with the wrong crowd, that doesn’t guarantee he will do what they do. Try to relax and, if he starts getting into trouble or acting differently, deal with it then, but don’t assume or fear that it will happen because it’s just as likely that it won’t and he will be fine.

This might be more about you being worried about him doing the things you did, but he also may not.  If it helps, my older sisters definitely got into way more things than I ever did growing up.  And I hung out with kind of a bad crowd. haha