Us pwBPD are notorious for getting angry and getting into verbal fights/arguments. I've become known for this in my friend group... I don't intend to start fights but I do. So I was just wondering if anyone has any coping skills, or advice to prevent fights, or stop them before they get really bad? 

Here are some background details to my specific situation: I'm in a discord server with my ex boyfriend. He was my fp, we got together then broke up multiple times. The last time we had any "romantic" interaction, he lead me on, only expecting me to have sex with him and not a real relationship. About a week later he got a new girlfriend, who he had apparently been in love with while trying to solicit me for sex. He tends to brag about his relationship in front of me, and even talk about his sex life in front of me in the discord. I've asked him to stop numerous times but he won't so I blocked him. None of my friends do anything to stop him, instead they get mad at me when I pick a fight with him. I can understand why they get mad, but I don't think they understand how triggering it is to hear your ex-fp brag about their new relationship. I know that starting fights won't make my situation any better, and that I can't change the past. But I also can't help but be mad that I seem to be the only one who get blamed for these fights, only because I was the only one who started them in the past. I really feel like some of my friend group is biased towards my ex, and sees me as an aggressor. I'm really upset that he has had barely any consequences for his actions yet I have... I think that's why I keep starting fights. It's just not fair to everyone else. A couple of them are very immature and, almost see in black and white more than me! A pwBPD lmao! But most of them I love dearly, and want to keep as friends. I don't want to disappoint them. I've asked the server owner to tell my ex to stop triggering me, but there isn't much more I can do. I just want to figure out how I can calm down, maybe be more self aware, and stop getting super angry then starting fights. Any advice is appreciated! :)