At first I think, Park jae-eon is just confused about the relationship,Maybe he has another problem with dating, after watching EP7 I was hoping that Jae-eon feels comfortable with Na-bi and that's true.
But after EP8 I have no hope about there relationship.Because he just wants Na-bi to just focus on him and he doesn't want Na-bi to get out of his hands, end up with do-hyuk.
He wants to try everything to get back with Na-bi, he never let her go because of Do-hyuk.He wants to try everything to get back with Na-bi, he never let her go because of Do-hyuk.
What I can say about Na-bi, she doesn't care Do-hyuk feelings, Why? She only feel sorry for him.
She thought only of Jae-eon, but what of Do-hyuk?
In the end she ends up with her own self, many mistakes and just regrets.