My best friend got grounded, she's going behind her parent's back to hang out with friends while they're on vacation. She told me she "doesn't care anymore," ...I get she's mad, but I gotta do something about it! Am I overstepping my boundaries?
All you can do is tell your friend you think she's making a mistake acting like that. But you're not her parents. They need to handle this. You'll just become the "bad guy" if you get too involved in her problems.