Vampire's Mate

Diary Riddle is frustrated. He keeps having visions of a walrus-like man, a horsey woman, and a pig-like boy abusing him. But this can't be possible, since he's never seen these people before in his life. Once Diary Riddle figures out that he's a vampire and he's having flashes of his mate's life, he vows to get his mate, whoever they are, away. For no one, especially not his mate, should have to live with the ever constant presence of fear. And once he rescues them, he will ensure that they are spoiled like royalty, and hopefully seduce them. The only problem?
His mate is Harry Potter, the boy he tried to kill.
Now, Diary Riddle must seduce the Boy-Who-Lived while staying out of the media's focal point, figure out what his other self is doing, and keep his identity from said target. This just got a whole lot harder.
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Dedicated to @STARGIRL246AA