I think because he doesn't have the courage to just confess and get this over with, and he's not decisive enough. He wants to get over him but also can't leave him alone. Ml still frustrates me more but I mc also frustrates me for those reasons.
It's because the ML clearly has poor understanding of his own feelings, so he has no way to properly communicate it. In contrast, the MC is perfectly aware of his own feelings, yet he chose not to say it, making assumptions about ML, and then placing the blame on ML when things go wrong. The drama would have ended in chapter 1 if the MC just confessed his feelings. The story wouldn't have been dragged for this long.
I don’t know why but the MC pissed me off so much than the ML. This feels like a long ride, I’ll just marinate this one first (￣∇￣")