@JaneJeon Wait, what party? I haven't read past this chapter yet so this is only about up to chapter 4
All I've seen up to this chapter so far is a guy who had loved someone for years, told her that he loved her, and never got any sort of actual answer. He eventually decided to make it absolutely clear that he's not just saying that he loves her, and when she realized that she agreed to go out with him. He wasn't persisting after she said she didn't want to go out with him (she literally never gave him in answer), he was just letting her know that his feeling hadn't changed.
After she agreed to date him, Nogata was understanding that it'd be hard for her to go from being friends for so long to loving him, he made it clear to her that he'd wait however long it takes for her to get to that point.
Nogata gets angry that the friend comes up and says he loves her, but that's completely understandable, considering he only did that AFTER they had already started dating, which is a complete dick move.
And I'm just now realizing that I'm replying to a year old comment, but I've already typed it out so fuck it