They tried to be poetic but it's a mess.

Uh Minyul has a problem too, to just like someone's face... And their relationship was broken.

Like I said, Minhyul apologized and reassured Jungsoo SOOOO many times that as he got to know Jungsoo more, he liked him for him and not his face! It is not uncommon for people to have crushes on people at first because they like how they look for specific reasons. Their relationship was 95% broken because of Jungsoo being standoffish, isolating himself for no reason, and ignoring Minhyul's feelings. Not only that but before Jungsoo lost his memories he left Hyun in the dark for Mihnyul, but when Jungsoo felt awkward around Mihnyul, he went running back Hyun and started acting like Hyun was the only one that was ever there for him when he knows DAMN WELL that Mihnyul was ALWAYS there for him. After Jungsoo lost his memories, Jungsoo treated Mihnyul like he was clingy and weird, and made him feel like he wasn't trying hard enough. All Jungsoo had to do was open up and accept Minhyul's feelings but he never did, he pretended he did, ran away, tried to cover up his feelings and accepted a confession from his best friend without talking about if they could work out or not and then it just ended. I see how it was TRYING to be poetic, but when you break it down, nothing makes any sense, and at the end of the day, Minhyul is the victim that never got any closure or help.