i find my life unfair

I’ve been having a very hard couple months, since the second I turned 16 (December), actually. So the first thing to go wrong was my best friend of over 6 years getting with the guy that I was inlove with. She asked me for permission but I find out it had been happening for weeks behind my back and even when I confronted her with proof she bold faced lied and then turned in on me, telling everyone I was inlove with her boyfriend and ghosted me for a couple days. This hit especially hard since she joined my school in September and since then had been manipulating me and pulling me away from all my friends. If I hung out with anyone that wasn’t her she would spam call me, message me hurtful things, chase me around the school and scream at me then cry when I didn’t wanna hang out with her. There’s so much more to unpack with her and this boy thing, such as her currently harassing me today and me finding out that she was spoon feeding him lies about me hating him to distance us and that she’s been routinely shit talking me. And another fun fact she actually had a hate list and on it is EVERY single friend I have other than her, she calls them “friend-blockers” and “hates them because they take (my) attention and friendship away” from her. I don’t have the mental stability to go into her situation any further so let’s go into something of the other shit that’s affecting me also. I can’t go prom. Well I could, but I have no means too. See the dress code is some gold and black glitz and glam bullshit and anyone who doesn’t follow the dress code will be kicked out of the venue. The issue is that I have a skin condition so I don’t like showing my arms, and I’m also abit on the chubbier side so I’m doing my best to avoid things tight on the tummy. My issue is that this makes finding a dress that much difficult. Fortunately, I’ve found atleast ten that I loved and were flattering on me, unfortunately my mum hates them all. Everytime I show her anything she goes on a rant about how I’m going to hell just because the dresses are JUST ABOUT above my knees. So since I have nothing to wear I can’t go prom. U may be thinking okay, well atleast I have leavers day right? Wrong. I have exactly one shirt, ONE school shirt, and for some weird fuckass reason the acrylic pen decided to smudge and bleed through meaning I had to bin it, so now I have nothing. No shirt to wear and nothing to sign and NO MONEY to buy another one. So there goes having my shirt signed + the leavers day experience. Because I have no shirt they’ll force me to leave the minute I finish my exam lol. And the most recent bit, the reason I’m sobbing as of this moment, is that I had plans that fell through. Originally I was supposed to go over to a friends house but surprise surprise my mum said no and bugged out on me, but atleast we made plans. Something I’d been looking forward too and was my only solace during my last shitty days of school. Welp guess what? Ur girl got cancelled on last minute. Apperantly drinking in a park is funnier. Welp that’s my life. Honestly does it get any better? I’m tired of this constant overwhelming feeling of sadness that clouds my mind. Nothing, and I mean nothing, has ever gone right for me. I’m starting to thing that nothing ever will.