It was pretty obvious that Neelix was in love with the captain, but that doesn't mean that we can justify a J/Neelix pairing. What I saw with Janeway and Seven is probably more than mentor/student, perhaps a close family bond, mother/daughter or maybe older sister/younger sister. I think it all depends on the slant that the viewer brings to the show, which means that people can imagine other pairings--J/7 or even J/Neelix, for that matter *shudders*. 
