Even in three there is two.
This is a moment just for Sasuke and Sakura:
Sasuke leans against the back of the couch, rubbing his eyes as Sakura unwinds and replaces the bandage around his latest battlescar. Nobody else is looking, so for a second, as he drops his hand back to his side, he smiles at her.
This is a moment just for Sakura and Naruto:
Naruto wanders out of the Ichiraku Ramen to peer at the festival going on outside. Behind him, Sakura waits. She taps her foot once, twice, three times, and then she grabs him by the shoulder and pulls him back inside. She didn't come here to eat ramen alone.
This is a moment just for Naruto and Sasuke:
Sasuke reaches the top of the tree before Naruto does, and he gazes down in lofty disdain (mock disdain even if only his teammates can tell). Naruto grins with a little more of the demon in it than usual, and then he grabs Sasuke by the ankle and pulls him down. They kick and punch each other with glee all the way back to the ground.
They have enough moments for the three of them every day and every night.