#school issues

Guys I have sad terrible news, my English teacher said we all failed our English exam!😭 But how!?! We didn't everything she asked us to do so how!?! Anyways I think I am kinda getting a bit too friendly with my ex best friend who said some mean terrible things to me and broke my heart.. Uhm she took a photo with me since my hair was down and I wanted to use my device and keep it and she told me to send it to her... Uhm if I didn't, she will ask why and get mad uhm.. I don't want any problems right now after what happened before but I gotta try get the courage to say no to people sometimes you know... Its just I am scared that they won't like me or say bad things to me or argue with me.. She added the photo to her status and she didn't even ask for my consent to put it on her status cuz she already knows I don't like it when people takes photos of me. There is a next one who talks to me she always does it and she said its not a big deal but its a big deal to me I even have to ask for her phone to delete it and she won't let me and says its not a big deal, why the he'll do they like taking photos of people randomly, my ex best friend video a boy in my class without his consent and posted him on her status.. What the he'll is wrong with these people taking photos of people without their consent like I hate it.. I hate that I an starting to get attached to the person who hurt me I don't know how to tell my brain what she did or maybe I don't focus on it too much.. Guys what should I do?.. The other girl when I tell her to delete it she sounds disappointed, she is a person who talks alot and when I need to focus on my studies she keeps talking randomly to me and bro I need to focus and when ai tell her I need to focus she always acts disappointed and if you are a friend why would you let your anger out on me and apologize and do it again when you say you wont do it again, you know my ex best friend did that to me alot of times and bro.. Stop letting your anger out on me.. Btw, the other girl lets call her R, she is always negative and when I sit beside her she always says she hates this and that and wish why they can't do this and that for the classes and its kinda pissing me off.. Like keep your thoughts to yourself, things are literal the way its supposed to be for a reason.. Guys even in class, she keeps talking behind me and when I don't talk to her she finds someone else to talk to and it seems like she's mad at me or something for not talking with her guys Im not trying to be rude or anything I just don't like being disrupted from my studies but I wouldn't ignore someone like that, there's a time to talk and not to talk, she made one of my classmates lets call her J, J was mad at R, and R wondered why would you keep a grudge for a simple thing. Okay J had water and R asked her for some when clearly she can buy one and J said no and R was like omg your selfish for not sharing but guys idk but its J water I guess that's why she is upset and J was telling me like you have the money why won't you buy your own water so she is basically saying R is lazy and wants free stuff smth like that, bro what is wrong with all these people. Guys please help me..