First off, correct you grammar and then tell me to educate myself. Second, I don't need to check any build up because im not dumb, and I am reading a the Magana as well and anyone can tell Sasuke is causing these mixed emotions from her. And im not a big on pairing like you, but I know when someone has a good point and you didn't.
First of all make up your mind, because you do seem to post on all the pairing threads yet you claim you are not big on pairings.
Second of all, NaruSaku has had a lot of development. It started with Naruto's crush on Sakura, and Sakura being annoyed with Naruto. It slowly built up to them being teammates, to being friends, to being best friends, and Naruto's crush for Sakura grew into love. Sakura and Naruto are obviously closest friends and that friendship has lots of potential to blossom into romantic relationship.
I'm not saying that NaruHina didn't have any development because it had quite a bit of development, but it was mostly one sided. Naruto always acknowledged Hinata, respected her and considered her a friend. Nothing has changed there. No development on Naruto's side.
Now, SasuSaku is the pairing I have problems with, the only thing that keeps it going is it's unused potential. It has potential but Sasuke has never even once showed even a single hint that he could maybe like Sakura even if just a little bit.