Isn't the issue with what you are looking for explicitly run into issues in that the story is not a romance, and doubly so, that Naruto could not understand if his feelings were platonic or romantic? That essentially answers the why you do not see the piece you require, though I stand that this piece is not a necessity of the ending's valid.
So we can have a narrative intent of where Sakura wantsa relationship with Sasuke. where Hinata wants a relationship with Naruto. Karin also showing some sort of hints towards Sasuke. But when it comes to Naruto you pull out the "there are no romance" - card.. i got it, you got nothing in your hands to support your argumentation you stated at the beginning. Thx for revealing it