I think you get to compare what happened in bleach and Naruto what happens in Fairy Tail is a bit ridiculous.
First Disculpen the Off Topic here, but necessary.
First in Naruto in one NarutoXSakura I never was established, Sakura was always in love with Sasuke, in this case incluzo when they left the original ideas of Kishimoto, as Hinata knew would be important to respect Naruto. What if there we always leave in clear the importance of Sasuke for Sakura and ultimately the same Naruto understood.
In Bleach, come on, even in the Maanga Pilot Bleach, we could see the idea of a possible relationship between Ichigo and Orihime, also in the case of Ichigo and Rukia in Manga never were handled in a way that seemed they were in a script romantic, they were too aggressive to each other, that aggressiveness seen in the friendship of two men or a pair of brothers, but not of a couple in love, while his relationship with Orihime was quite different from the others, even to which he was with Tatsuki, her childhood friend. Orihime was rather more cordial, careful, hastacaballeroso, she always treated her in a peculiar way.
A further issue is that we have seen both as Rukia Sakura at the time supported Hinata and Orihime respectively. That already makes it really emphasized on one thing was impossible, but focus on characters that had not really tried anything.
Regarding Natsu and Lucy, not that Mashima not the will, he is thinking about it, his words must always read in two ways, not just one as we have become accustomed to do (when we know that he has the tendency not to release important data on the relationship of characters at once, or how it will carry it out)
What couples if I recall the had not decided to canonize any outside AlzackxBisca, but in recent months has been creating scenarios to canonize different couples repeating a style that had already been used in Rave, which is put in a risk of death while facing each other and that this can prove how popular or loved ones are couples.
I'm a fan of nalu, but I know there is always a possibility that is not in on the plot, but that does not mean I'm still a fan of Mashima and his works and now my biggest interest is to see the development of Lucy as Magician and as it will continue showing more power.
Sure, I'd love to see the Nalu made official, but I'll settle for seeing Lucy fully developed.