I just wanna say let's give Jooan some times for him to grow into a better character. I see the author obviously made his character flawed like how he has this narcissistic side and a self-centered bc it is part of his arc. Once he starts genuinely falling in love with Seojoon, I bet he will becomes the character that we are all will adore so much, his character development will be so good.
We see him and Seojoon has the opposite personality, that's why when Jooan start to really falling in love with Seojoon, he'll learn how to care about others and not just thinking about himself from Seojoon. Seojoon will be the reason for him to become a much better person
What he said is dumb, yes and it makes him looks like he doesn't take Seojoon's feeling seriously and just being selfish. But, he had a long time crush towards Hajin and all this time he thought Hajin was the one for him. He didn't realize what he felt towards Seojoon is also love and by the way he act, he prioritize Seojoon more than Hajin. He can let go of Hajin, but can't let go of Seojoon.
Just give him some times, this blondie will eventually falling even harder for Seojoon ╮( ̄▽ ̄)╭






Something I iust noticed, Seojoon doesn't wear his piercings anymore. Idk if there's a meaning behind...