beta
If you think about it, Wooyeon here is someone who's not gonna accept any reason except that Inseop saying he likes him(be it maybe the truth or not). That's the only thing he wants to hear from him. He has yet to experience of loving someone prior to him falling for Inseop. That's why instead of him recognising/putting into words the feeling of being betrayed by the person he loves, that reflects to him forcing the other party to utter the word of and to do the act of love to him.
I know Wooyeon has mental issues, I've finished reading the novel too, and have seen how his way of thinking works. I won't defend his actions but just tried to analyze his thought process. This guy's firsts in terms of love emotions will be with Inseop.