So J. K. Rowling thinks Dumbledore is gay. As it's being reported, she "outed him" Friday night at Carnegie Hall in New York.
But what difference does this make? None whatsoever. First, because Dumbledore's homosexuality remained in the author's mind and never shows up in the text itself. You can go back and read the novels and look for signs, but you'll find nothing even close to explicit. It's not part of the story line.
Second, as a friend of mine has noted, why not also out Neville Longbottom? Or Snape? Or MadEye Moody? Or Dobby? Or anyone else for that matter who doesn't have a girlfriend or a wife in the novels? Whatever thoughts Rowling may have had in her mind about a character, what the reader must pay attention to is the text of the story. Rowling may reveal one day that all the magical powers possessed by the witches and wizards of her novels' world were actually gifts given to certain humans by extraterrestrials when they visited to help the Egyptians build the pyramids. But this never shows up in the texts of her novels, so it is irrelevant. It makes no difference whatsoever in the actual story line.
Authorial intent is overrated. The text has it's own life.