The first part is a misunderstanding of Naruto. Naruto cares about all of his comrades, but his feelings for them are not equal. Many of his intense reactions, for example, the worst feelings he has ever felt, source from Hinata. This isn't pairing goggles whatever, I'm literally sourcing a passage here. Often this is returned with "Well, he'd have done it with anyone", but Jirayai died, Kakashi was dead, the village was destroyed with others dead, and none of them had caused him to do this. Not to mention Pa frog died in front of him, Ma Frog got shoved away, and he still didn't do this. It wasn't until Hinata was killed in front of him that he did this.
The Second part is true, NS Development exists, but is explicitly shut down as being romantic development in the Land of Iron Arc, which you reference.
This Arc tells us that the promise was not a burden to Naruto, and it had nothing to do with him about being so in love that he was willing to sacrifice his happiness, he wanted to save Sasuke too. The "So in love part" is factually proven wrong, in this very arc, and really, even in the moment, because he's not sacrificing anything?
The error with the Sakura side, is while she cared about Naruto, was being her trademark caregiver here, she didn't understand Naruto, or believe in him and his dream of becoming Hokage. But she didn't want him to be stuck as a genin forever.
It's not explicitly stated that the crush died at X time, but crushes naturally fade, the Land of Iron destroys the Notion of NS anyway, so its shown well enough that its not going anywhere, and that's all that's needed. Obviously, by the time we get to the end, we know this crush is gone. Fans can argue and speculate on the when as they wish.
Yes, there is no explicit romance with -any- pairing in the manga, except SS in 699, that's it. But there is plenty of development and foundation for that canon pairing, which points to the 700 conflusion.
I actually respond to arguments line by line, and indeed, see above, point to examples in the manga. The goalposts aren't being moved, but of course, rather than argue the points, you are complaining about "intelligent" speak I'm slithering into. Classic conspiracy theory making.
Or maybe I'm just having a discussion and using the diction I'm familiar with.
0/100, F, See me after class.