Heaven is a place on earth with you

Sakura had realized that Naruto and Sasuke were simply something else - two people who had nothing but themselves and their pride - occasionally this team - but always each other. Each other to push beyond the limits, to protect, to knock sense into - to be equals and opposites.
Naruto had chosen Sasuke, over time, grudgingly, Sasuke had chosen Naruto too.
or,
Sakura watches her two idiot teammates over the years and concludes that they are very much in love, if that word is even enough to describe what is between them.