i//Ignorance
Naruto was ignorant.
He was completely oblivious to the way Sasuke truly regarded him. He never noticed the way those dark eyes would look at him for extended periods of time or how Sasuke always seem to drift towards him whenever possible. He never thought anything of the touches that didn't always need to be nor the way Sasuke seemed happy when he got angry in a way which wasn't sadistic, but that might suggest he found it cute. He didn't think Sakura's jealousy meant anything because she was always mean to him and didn't pay much attention to the sighs Sasuke would give when he was leaving. And Sasuke couldn't gather the courage to tell him.
Sasuke was ignorant.
He had no idea that Naruto was a was a better actor than one might suspect, because Naruto really did notice all those things. But he feigned ignorance. What he didn't feign was fear that maybe he was wrong, or that maybe it wasn't a good idea, and that's what was keeping them both ignorant.