Naruto and Sasuke were both in the academy for years together before joining team 7 which is where they spent alot of time together,going on alot of missions together,being in multiple life and death battles with each other,and saving each others lives.
They both grew up similarly with being alone,being lonely,having no parents,they have an understanding of each other which most people don't.
Naruto grew up without a family,and friends for a long time.So his friends are even more important to him then they would be for most people.
Sakura has been fangirling over Sasuke for years.She's had a crush and has always been fantasysing about being with him,even despite him clearly not being interested.
There's a big difference with Sakura than Naruto and Sasuke.Infact,in chapter 3 Sakura made fun of Naruto for being an orphan,which angered Sasuke - another orphan.So that shows that even when they just started Team 7,Sasuke and Naruto had an understanding/Bond with each other that most others don't understand.
Naruto has said that he sees Iruka,as a Farther,and Sasuke as a Brother.That says alot about how much he cares for his friends,based on his childhood