What to do if…
A girl in your class starts showing up with expensive stuff and talking about moving in with her older boyfriend.
Another way older men/women can groom their victims is by having them move in to their place. This allows them to have more control. If you feel like she is endangered, let someone know. If you start seeing bad signs like: she isn't coming to school, she's bruised, or she seems distant, then you should really let an adult know.