User blog comment:FairyRaven/Fairy Tail Chapter 331: Natsu's Strategy, Review and Commentary/@comment-112.205.79.141-20130517122559/@comment-60.53.101.239-20130517162846

I think what their saying is if you put Natsu in a relationship, it'll make the friendship theme of Fairy Tail affected by some extent. I mean the reason fans follow Fairy Tail is mainly due to its main theme of friendship and not romance.