I personally believe that there will definitely be pairings by the end of the Naruto manga. Just the fact that Kishimoto keeps bringing up love and romance should be proof enough that he plans on going somewhere with it. I do not believe that Kishi will have a small special at the end showing the couples years down the road without completing one main pairing. Either NS, SS, or NH. Though from my point of view, there would only be NS or SS, I really can't see Naruto being with Hinata. NH is a very unusual and unfit pairing. As many have said, Hinata admires Naruto. I think that Hinata doesn't romantically love Naruto, I think Kishi is just showing through Hinata, the effect Naruto has on his friends. Her desire to protect Naruto goes along with everyone else, its just from the perspective of a girl, as opposed to Naruto's many guy friends. They are all out there fighting tooth and nail to protect Naruto. When Kishi showed Hinata in a panel I believe he was just showing her resolve compared to how she was in the past.
That leaves SS, this seems like a dead pairing from all the negative development Kishi has givin it, however he still brings in romantic love from Sakura's side. It was just one panel and it was negative like all the other SS development, but Kishi still brings it into his manga. Not saying that I can see this pairing spring to life either, like NH, I just don't see Sasuke and Sakura being together, just wouldn't fit.
Then with NS, we have all the positive development. We have already had it proven to us that Naruto romantically loves Sakura, though that was obvious. Then with Sakura, Kishi has made givin us a ton of development towards her feelings for Naruto. Though we haven't received proven without a shadow of a doubt proof that Sakura romantically loves Naruto, Kishi has implied her as having romantic feelings for Naruto since a little before Naruto's 4 tails fight. He greatly developed their friendship even before that fight.
Kishimoto has for some reason put time and effort into Naruto and Sakura's relationship. This is the most obvious couple out there right now, though Kishi has kept SS alive, perhaps as build up to something big coming up, or maybe to create a twist for NS in the end. Anyways, from where I am sitting, there will definitely be a pairing before the end of this manga. I mean, that is kinda the theme right? Make a new generation and steer them towards being better than the last. Oh well, lets just sit back and enjoy the ride