This is a serious domanda I Need your help

At my summer camp there's this girl whom I'm going to call M who is a total itch to me and my bestie, I. M detto when we were in voice class waiting for Ms.Q, "Hey how about we all play would te rather?" And then she looks around the room, stops at us, and says "well, just me [K], and [J]"and she detto that still scowling at us! And then later we were watching "Against the Odds" movie. Me and I are doing the camp news paper, and Mr.C told us to take notes on the movie. K, J, M, AND EVEN N were loud and obnoxious and annoying and they were supposed to be watching the movie too! Every time I tried to shush them and help them out they give me a nasty face. I even tried to ignore them but they were so loud with their iphones and giggling. So I told them off. THEY HAD THE NERVE TO SAY THAT I WAS BEING RUDE WITH MY "OUTBURST". WTF?! I don't wanna tell, because it isn't like physical contact, o full on bullying. I'm trying not to care o act like a baby about it, but I help being overly angry. (Part of it might be hormonal) consigli please?