This is what I remember.....
Seo Juheon had found out that dohu approached him with a motive(to write a story).... And after that started doubting dohu and they had a fallout....after that Juheon asked for time and Dohu being Dohu just didn't reach out to Juheon which made Juheon doubt Dohu even more...Dohu asked Juheon how long he needed to wait and Juheon was like "you should have tried reaching to me" ....and then Juheon disappeared
I remember dohu did say "I love you" to juheon but juheon couldn't believe dohu and told dohu that it was the first time dohu ever said that to Juheon and since it was after Juheon caught Dohu, Juheon didn't believe him(it's in the back of my mind.....it might have happened or maybe I read it in some other manhwa)
Please if someone know what is happening, spoil me.