She mentions a number of times that he is her fiance.
At the time Janeway was commissioned as captain of Voyager, she was engaged to Mark Johnson, with whom she discussed the fate of her pregnant dog. Believing her dead after Voyager was lost in the Delta Quadrant, he married another woman in 2374. (VOY: "Caretaker", "Hunters")
this is from Memory Alpha. She discusses the man she was engaged to in "The Disease" when she and Harry have a stand up argument.