I don't feel bad for him at all. He went after a serious guy like Jihye while he has that ...

I didn't say whether he was playing with Jihye or not. I was making the argument that someone needs to sort out their shit before going after someone in a romantic way. He knew the pervert was messed up in the head and kept doing creepy things, it's not like he went from being a normal friend to acting this way.

Also, "ending it"? How does that make sense ? He loves someone else and wants to prove his sincerity but he casually kissed another guy as part of "ending it" ?
I don't think I'll suport this relationship any time soon. Jihye deserves much better

I truly do suggest you re-read chapters 84 and 85, I think they answered a lot of your concerns.
Also, I believe this image to be a good reply to the "casually kissed another guy" argument:
http://iweb11.mangapicgallery.com/r/newpiclink/sign_language/96/643211b11e7422ab8aa7784a78cf07be.jpeg

yeah I did make a mistake saying that. I read too many webtoons and I thought he agreed to kiss him but still, somehow I can't like this guy at all.
I just hate the fact that he had a relationship with the creep (I don't mean that kind of relationship, just A relationship) and the creep even talked to Jihye in one chapter so he knew that Jihye was going to get dragged into this but still pursued him. It just bothers me a lot

I understand the need to protect Jihye, but I have to stand up for Gyoon as well. Like I mentioned, chapters 84 and 85 sum the whole thing up nicely: in an act of desparation after his brother did the things he did, and his friend went blind, Gyoon requested that

Oops sorry trigger fingers
Anyway, Gyoon requested that Mr. Soh keep an eye on Jihye so that Byung doesn’t even come near him. This whole time, Gyoon has been telling Jihye he loves him, it's just that Jihye never believed him, so Gyoon settled for just being near him while having Soh keep Byung away. Like a silent protector from a distance type.
Then, Jihye actually starts acknowledging him and Gyoon tries to break the relationship off - chapter 84 contains a flashback where Gyoon explicitly tells Soh that the deal is off since Byung has left fhe country.
THEN, in an attempt to rile Gyoon up, Soh brings Byung back and gets Byung and Jihye really close, just to make Gyoon angry, because he knew that was the only way to get Gyoon to talk to him again/lash out at him like he wants.

So, basically, the only way Gyoon could think of protecting his friend and crush was to bribe Soh in some way - otherwise his very crazy brother could have done god knows what. When his brother is removed and there is no more need to protect either, Gyoon breaks the relationship with Soh off. However, Soh purposefully brings Byung back into the country and puts Jihye and even Soohwa in danger just because he can't take being ignored by Gyoon. It is only when the chairwoman threatens him that Soh backs off, but not until violently demanding Gyoon kiss him and then aggressively doing so against Gyoon's will.

I hope that clarified everything. Truly, I do get the need to stand up for Jihye, he does get trampled on a lot by everyone because he's kind, but I do feel like Gyoon was out of options. That by no means implies Gyoon's perfect - he has temper tantrums and can be two faced in the sense that he hides who he is in front of Jihye - but I don't think he's a bad guy, and I don't think the blame should be placed on him in this case. He's a victim of an obsessive man who can't get what he wants so he settles for ruining others' lives to get a substitute for a relationship that's out of reach

Aaaand I just realized that at one point I said Yohan went blind, I meant deaf* sorry, it's a bit past my bedtime
Spam truly over this time