"Yeah, Shimotsuki asked me to be her friend, but I was too big of a pussy to actually do it, so now I'm friends with her enemy instead and I'm not willing to talk to her at all"
Bro acts like Ryuuzaki is some omnipotent being which can erase him instantly if he just defies him.
Let's ignore that this is a manga for a while and focus on the setting. MC is so delusional, that he actually convinced himself that Ryuuzaki is the main character, and he's the "mob" character. And of course, as a mob character, he somehow can't do anything about it. Bro's actually just mentally sick and thinks he's inside of a story.
And his constant internal monologue is pure cringe, you can just tell that the author wrote it and thought to himself that it's "witty" and captivating. I can't read it without cringing the whole time.