Problem in Paradise

Ah, I'm quite in a predicament now. I've got about five more letters since the last time I've updated, I'm just wracking my brain for answers- nonexistent answers that is. Really, no one is as they seem. I really cannot trust anyone, everyone is so suspicious. So firstly, I'm extremely confused right now. On Friday I broke up with my boyfriend (now my ex) and immediately after at the end of the day I got two more notes. One said, "Good Choice! My job is done! - Z or (Gonna call her Person K)" At this, I was shocked. The person told me who she was. Though I thought that was suspicious I couldn't help but be ecstatic. I just found out the mystery! But wait, why would she say her work was done? I then proceeded to read the second note, which was surprisingly similar to the first one, "Great Job! I've done my Job!" With no signature. I thought that was quite strange, and the second note I could barely make out the words the writing was so messy. Monday morning I got a note in my locker saying, "Bitch really great job now breath your friendship with A and your new friend B your really friends with her." Which I found revolting. No signature again. I also noticed the person who spelled the name 'B' spelled her name wrong and it was erased then spelt again-- wrong. I found this extremely strange again. I went to math that day and spoke to B (who was apparently my new friend? Bleh) and she told me she had gotten a letter in her locker a while ago by someone with a Z with a line through it and said something about don't become friend's with Liana she's gonna dump you and hurt you, etc. And that was a while ago. Then she said she got another note that day saying, "How dare you become Liana and A's friend. You've made an unforgivable mistake." My only thought was 'wow, stalker'. After speaking to B for a bit she had told me she had no idea who Z was (I said the name that I was suspicious of, the seventh grader). Which I found suspicious since that person knew B's name and had even said "Leave B alone!" To me once before (note). Me and B continued to exchange notes that day: B- do u actually think i know that person I'm getting scared L (me)- I used to think you two knew each other. Do you know any 7th graders? B- yes angle my nieghbor L- any others? 'angle' is your neighbor? Is that her real name? B- yeah not much of an angle though she is really mean @ times L- Do you know Aniah's sister? I think she's in 7th grade. (I'm only saying names because they don't play a major role in this 'show') B- Ms Red pants? I don't know anyones sister ecept my friends L- alright, I think her sister is Z/Z (idk how to spell) also does Z (with a line through it) seem fammilar to you? Also do you think 'K' has anything to do with this? B- 'K' what does she look like have I seen her wait doesn't she have a major crush on Collin ur bf? do u what to know as badly as i do i really want to know who is being so mean to u u didn't do anything L- I think she was jealous cause I didn't know she liked Collin, she gave me a note saying (- Z or 'K') saying 'My job is done' the same day I broke up with Collin. I'm kinda scared. This got 10 times more confusing. I think 2 people have been sending me letters. B- Who 'K' t? L- a slut. she's dated 10 people (guys) this year B- who tell me u can trust me *,* L- 'K'. She's 'K' lol. B- right I'm stupid Z(with a line through it) looks familiar though L- yeah tell me if you have an suspicions or ideas B- a girl that is dirty blonde and med. size L- yeah, kinda small w/freakles B- yeah i think it waz her L- ya. two peeps tho. her & 'Z' B- do u think aniya is involved? L- Nah B- Dont trust her ever backstabber L- I know don't worry B- good And that's that.