Do I have a sign saying “shes vunerable, take advantage” on my back?

This crap is getting really old. My new boyfriend, the one afore mentioned, turns out to be nothing that i was expecting under pressure.
The story starts on Thursday after school. Im texting him and his ‘best friend’ takes his phone and starts a convo with me like she knows me. Being the polite girl i am, i keep talking to her. She then tells me she has feelings for my bf and so my friend takes my phone and politely tells her(under me) that there needs to be boundaries cuz were dating. This girl starts trippin on me and i leave with my best friend. She takes my phone as well and they get into this huge trash talking fight which ends when the girl kisses my bf then tells me my bf wants his phone back. By now, im so pissed but im in public so i cant do anything. Hes like ‘i have to tell you something’ “what” ‘she kissed me outta nowhere’ “this is — im gonna kill the ***** for hurting my friend’ thats what my bff texted him. We keep talking. Arguing really and hes like “i still have feelings for her shes my first love….” “we need to take a break before i can decide which one of you to make happy” and im like “whatever. Hope u figure it out soon”

Fast forward and im in my room. I dont cry anymore so i face my cement wall, turn up five finger death punch and repeatedly punch the wall. My hand is a giant bruise and im pretty sure my 2 knuckles are broken. My parents dont know yet and im going to tell them i slipped on ice and fell on my knuckels. I dont know whats going on with my bf. He ended up talking to me yesterday before the ‘best friend’ showed up and he told me they were going to smoke and hed text me later. And he hasnt. I also cut my arm 8 times, half the number of days we were dating. I think im numb at the moment thats why im not all depressed right now but its coming, i have 3 days of exams next week and im not going to study very hard cuz its so stressful