god we give horrible advice, don't we.
Yep, I think it's people attempting to be funny or act stupid, something close to that.
Tell a teacher if it bothers you that much.
"I'll keep an eye on her." means I don't care in teacher language.
Tell a counselor or something like it.
Ask if she's okay, and if she says no, tell her that if there's ever a problem, she can talk to you