Inspired by this question (about interspecies pairings on the LOTR universe), I was wondering whether Gandalf ever had a romantic partner or spouse?
I've read the books several times, but I don't remember ever this being mentioned or even hinted at. Certainly in the movies (and especially in the Hobbit trilogy) one may detect a not-so-subtle hint of affection between Gandalf and Galadriel that goes beyond mere friendship but I would attribute that to Peter Jackson's vision of the mythology.
In any case, for this question I'm only interested in the books and any letters that Tolkien may have written.