First of all, during the first two discs he shows NO interest in Rinoa whatsoever: he even confirms himself that he knows about her flirting with him and all about it,
Although he doesn't show much intrest to her on thoese disks saying that he showed no interest is streching it wafer thin.


Look at the scene in Deling when Rinoa loses to the Ignions. He obviously cares there. It is that scene that made me guess that Rinoa was the "interest" of the game,

He has dificulty because of his life, and I know because I've had experinces.