For context, I'm a 15 year old, (Actually 15, not one of those people who pretends to be like 20 diff people). I was dating this 17 year old girl, of which I am going to call M, as I don't want to give her real name. So basically, M was... a handful, alcoholic, drug addict, Cheater, the works (It was long distance, so I couldn't stop her), and a couple months ago I dumped her Properly. She took it... bad at first, begging for me to come back, but then was alright with it. Recently, I noticed I had her still on snap, so my dumbass decided to message, I still don't remember why, about how it was ironic her favourite song was one about manipulation and being a liar, when the whole relationship was a lie (To the point she lied to me about being raped on 4 different occasions). A couple days ago, she replied and was saying about how I'm a horrible person, and that she's now happily married, so I was just being a tiny bit of a prick, saying "Don't care" and "Womp Womp" When she was saying about how I'm a bad person. Then, I blocked her, but forgot I still had her friend (Who I'll call Z) on snap, so Z added me into a GC, and cuz I didn't remember what I had her as, I couldn't instantly unadd her and be done with it, so I was leaving the gcs, and after about 1t times, I had just told them to fuck off, and it didn't work. Then, M sent a message in the group chat, saying about how she's going to get me killed, (As seen in the first photo.) Then, I messaged Z about it, and you can see what she said, in the second photo. Right now, I'm wondering what to do with these screenshots, I also have screen recordings of her admitting to crimes. Some friends have advised me not to go to the police, some have advised me to go to them, and I'm not sure. If you lot need any more context, just ask

Uhhh, what do I do with this? (M15, about F17)