Pretty much this.
There was no logical reason for Naruto to be so self sacrificing for Sasuke EXCEPT because of Sakura. That made sense, the kitten fest afterwards did not.
Unless Naruto wanted the sauce for himself 
Awwwyeeeeeesss, That gif needs some work, but its getting there.
If you know anything about Hunter x Hunter, then you'd know that a Naruto took a lot of concepts from it including:
-Scarlet/Sharigan eyes
-Evil Older Brother
-Rivalry between friends
-Creepy pedo villian trope
-Chunnin Exams/Hunter exams
And there's a lot more. But I'm mentioning this because a few months back I came to the conclusion that Kishimoto was writing his story through Hunter x Hunter. In other words, what he read from one manga he felt in his own. So Naruto and Sasuke's relationship was supposed to be a mirror of Gon and Killua's relationship, yet he didn't write it properly so because his feelings were really being driven from Togashi's manga, thus creating a significant amount of laziness in his own writing. So like an "incomplete" piece. It's a known fact that Kishimoto is a huge fan of Yoshihiro Togashi as well, and you'll even find hints of Naruto in Hunter x Hunter.
I wanna make sure I'm being clear here so I'll give you an example: Imagine falling out of love with someone and falling for someone else who looks just like that person, yet the new person has a completely different personality. Same concept. You're basically feeling emotions from something else but forcing it upon another.