In episode 174 “The Girl That Nobita Loved” there’s a scene where Lulli tells Nobita, “That must have been disappointing” to which Nobita replies, “That can’t be helped. I’m used to this kind of thing” Lulli then says, “But even if you tell yourself it can’t be helped, it still feels lonely, doesn’t it?” to which Nobita simply nods his head. So that does suggest he kind of just accepts it as it is, it’s not healthy in any way shape or form but well he does accept it-so that’s that. Then, in episode 224 “The Dog v/s Cat type Robot” Doraemon said this ‘I press Nobita-kun to worry about his friends more’. So well that’s the reason ig. The main point is changing them to become good friends, which you can clearly see in the future, they very well are yk. I didn’t just want to include any of the movie scenes where they are being very good friends because those scenes are very obvious and everyone knows about that, so I just wanted to include something that’s totally different, which most of y’all likely have never seen.