He was the one who tried to out the poor guy in the first place, he caused the break up and he blackmailed and force his way in...
I don’t think he was trying to out him I’m pretty sure he was just teasing him, he really likes his embarrassed face. Not trying to justify him but after they kissed the first time he didn’t need to go out of his way to meet him anymore. He may have forced his way in but that don’t mean they didn’t genuinely build something in the three years between them. They had probably genuinely built a trust between them and he didn’t want to out him.
I don’t know if anybody remembers but Haehyung he’s trying to keep it a secret and when it was about to get out that he was gay back in middle school he had to break up with the dude so I wouldn’t be surprised if he doesn’t want to out Haehynung And risk having to break up with him. All he’s doing is trying to keep Haehyungs secret. Also Haehyung doesn’t wanna do anything out in public I wouldn’t be surprised if he still hasn’t come out to his family, but his brother just knows and is asking why he’s grown to like his brother so much. This is honestly just a huge misunderstanding