Ok, I need to say something because people really need to understand something about relationships in this manga, and perhaps just in general.
Firstly, the concept of "love" is not something a 16 year old
children can grasp. I don't care how "mature" they are because they are ninja, none of them are experienced in the ways of love, not to mention they are a bunch of hormonal teenagers. Not saying I have all the answer for love at my old age of 22, but to say these characters know what the hell love is is absurd.
Examples. 1) Sakura's obsession with Sasuke. Like all young girls, Sakura "loved" Sasuke because he was handsome and intelligent. O, great reasons to "love" someone

Her reasons to keep "loving" him can be chaulked up to the trauma of him leaving so early when she thought she loved him. Fact of the matter is Sakura doesn't love Sasuke because she has no reason to, her obsession with him at the moment is connected to the trauma she suffered, and like all teenagers she has no control over her emotions.
2) Hinata's obsession with Naruto. Are you kidding? How many conversations had they had before they spoke?
She admired him because he was brave and handsome. Ok....She first admired him because of what reasons again? What was there to admire about a cowardly, stupid, and rude young boy? Or did she like him because he was just different and awkward like she was? How can you tell someone you love them without ever having a meaninful conversation with them? People love to say Hinata's "love" for Naruto is so sincere...blah, blah, blah. The truth is, her "love" for Naruto is no different than Sakura's love for Sasuke or Naruto, she simply presented it much better than Sakura ever did.
Hinata was there for Naruto? O really? Please show me when. If my memory serves me correctly, Hinata hid in the fucking corner mumbling and shitting herself. Never ONCE was she there for Naruto.
Naruto was treated as an "outcast" when his friends didn't know any better when they were all 12 and 13. He didn't help matters by acting like a child and being a complete and utter moron either.
As for Naruto exploded when Pain "killed" Hinata, he did so when his seal was at its weakest. If any of his friends had been killed in front of him he would have acted the same exact way. He did not do that of his own free will, whenever his emotions got out of wack, the Kyuubi influenced him into using his power, he nearly removed the seal under the Kyuubi's influence if not for Minato, so please don't make things up.
As for why he didn't explode when he rescued Sakura, well shit idk, maybe he didn't want to kill her while she was in his arms, and he no longer needed the Kyuubi as a crutch to fight his battles. He had better control over his emotions, and if he did go ape-shit at this point he wouldn't need the Kyuubi to do so.
Even if Sakura's feelings for Naruto are fake, its at least understandable why they could be real. No one knows Naruto like Sakura, no ones spent as much time with him outside of Jiraiya. Whos name was Sakura screaming for during the Pain invasion? Naruto's. And who ran to Naruto first when he came back? Sakura.
And wow, Hinata would have cheered on Naruto while he fought people....woo she should win a medal for that. Should be give her a sign and pom poms too?