Curate, connect, and discover
I am by no means presenting this as solid or legitimate proof but this scene is what really makes me believe that Naruto , off panel , has already answered Hinata’s Confession. I know there is NOTHING tell tale here but I remember studying implicit exposition and character interaction in play writing , and from Hiashi’s lecture, to Naruto’s annoyed response , there is definitely a sense of familiarity between the two… Not proof, just my two cents…