My friends tried to kill ,e

So in 4th grade I had a bff let's call her Amara .Amara was really sweet and she did not seem mean at all but a couple weeks after becoming bffs I showed her my friend group they were 4 people let's call the FM Lucy 17 M Leo 19 and FM Sarah 16 after I showed her my group she became really suspicious and did not talk to me. Then after weeks she started to hang out with my friends and whenever I asked to hang out she would say no I'm busy but when I check her story she's hanging out with my friends. A while later she became my bully and would bully me everyday she saw me until one day I heard her planning to kill me and I was shocked because she was my bff but I had an idea to make her regret everything. So when she asked me to go hang out at the park I knew what they wanted to do so I posted Amara's biggest secret on an secret account. Then when she checked her phone it was all on the school news and she was shocked and devastated but what they did not know was that I called the police ahead of of time and sooner or later we heard sirens pull up . They handcuffed my friends and put them in the police car .They got 5 years in jail for attempted murder.