To me Naruto and Sakura can't be happy without one another.
That's what the manga told me all along.
Naruto is with Hinata because it's his duty. Neji told him to do so...
And Sakura is with Sasuke because she doesn't want to be a terrible woman toward Hinata.
It's all for Hinata's sake... meanwhile, Naruto and Sakura are utterly suffering.
For Hinata's sake Naruto never confessed his love to Sakura and he lied to his father.
He also made his mother's advice a lost/vain advice.
For Hinata's sake Sakura never really realised her true feelings for Naruto, and now she's stuck with Sasuke (correction : she's not even with him. Sasuke doesn't need to be here to make her suffer), suffering.
If Naruto and Sakura would be true to themselves right now in the manga, they would be like they are in those fanarts.