I like this series as well as comments. Such wholesome the chapter is, such trashy the comments, as usual. Is this what they call "gap-moe"?
As some adequate guys said, if he apologises, clears all past misunderstandings and moves on, then he's safe. If he's trying to hit on her...well, yeah.
Funny, but I think it depends of whether they had sex in the past or not. If not, then he is clearly a nice guy. If they had, then he clearly wants for more, because it doesn't look like his current girlfriend gives him.
Still, I think that he's a good guy.