Posibly. Most shonen has canon pairings, either major or background(or both.) In this case, though, it may just be because Orihime's crush on Ichigo has been made blatantly apparent at various times(though mostly early on) and no other crushing or liking has been as canon. I'll be rather annoyed, though, if Ichigo suddenly starts acting like they're a thing, as he'sd never shown that kind of interest in her before(or in anyone, really.)

This icon is largely spawned by the fact that only extras died throughout the entire Soul Society storyline despite multiple skewerings, and the Rukia one I've been using a lot lately is because she always looks normal sized, until drawn next to Ichigo, Renji or Byakuya, when she looks like a midget.