Perhaps it was just him being selfish, needy. He feared that Jiyong would appear and snatch her away from him, as he did a year prior. He remembers when Ji and Dara first started going out, how for 8 months, they were inseperable. 'But Jiyong's moved on, right?' He tries to reassure himself, though he knows the reason that Jiyong hasn't had a stable relationship since she left had something to do with her.