Preach
I agree with everything you said, except the part about Heesu being annoying. I've had a long lasting crush before and acting like that is 2nd nature, you WANT to be close to them as just that's enough to make you happy. You have to keep in mind as well that it's become the status quo at this point as well, Chanyoung never said it was annoying, the only thing he made clear was that the possessiveness was annoying. Heesu stopped that immediately. It's also not like he's with him "24/7". Heesu's said that when Chanyoung gets a girlfriend he's ignored and Chanyoung hangs out with others as well, which you can see since he's popular. Chanyoung went out of his way to hurt Heesu back then to get him to stop with the possessiveness, in extension he hangs out with others since he "can't only hang out with him". It's just that this is told from Heesu's PoV mostly and he wants to be around his crush as much as possible so we see when he's successful.

Honestly people saying that "Chanyoung's heart is in the right place" and "his intentions aren't bad" can just shhhhh because we all know he isn't doing this to "help" Heesu or to "not hurt Heesu's feelings if he tells him that he doesn't like him in that way" No, he is purely doing this because he selfishly wants Heesu to back the hell off without being the bad guy, honestly if he sees that his tactics of "distancing himself from Heesu" and "going out with thousands of girls" is not working, he needs to human the fudge up and tell Heesu straight "Listen dude I know you like me as more than a friend, but I don't like guys, but I still want to be friends" yeah Heesu will be hurt but he'll realise he can't force someone to like him and get over it, forcing a relationship onto Heesu is actually a far worse tactic then just telling him the truth so that everyone can just move on with their damn lives, the way Chanyoung's flashbcks only consist of Heesu annoying him is proof of that, there are no flashbacks where he thinks "wow Heesu is such a good friend and I know he likes me, but I don't want to hurt his feelings" nope all his flashbacks are centered around him and how everyone loves him *rolls eyes* and how when Hanseul asks about their 10 year friendship he can only recall 1 good memory...? I'm sorry, but that's not a friendship, that's just Chanyoung liking the fact that someone basically devotes their whole life to him. Also can Heesu calm the fudge down, we have all had crushes and I get how he doesn't want to be the centre of attention and that he doesn't believe that he is a "hero of a manga" but that doesn't mean that your whole universe has to be centred solely around one damn person and that doesn't mean you can cling onto them for dear life and only value their opinion and care about what they are doing 24/7 like how can anyone not start getting annoyed with him(╯°Д °)╯╧╧. Honestly Seungwon...yeah I have nothing to complain about, you're doing great sweetie(づ ̄ ³ ̄)づ also side note, I'm just ranting my feelings here, I don't hate the manga or the storyline.