Once Riddle was killed and Harry was finally free of having to always fight, he choose to leave. Leave the World that had been willing to let him die for there mistakes. Including his own mentor, a man he had trusted, mistakingly, for seven years. Even the Weasleys had betrayed him after he refused to be with Ginny. They had expected him to marry her like the good little boy he had been before he viewed his mentor talking about his necessary death.
Before he had become the Master of Death. Before he had lost the last of his innocence's by killing someone, even if Riddle couldn't really be regarded as human anymore. And before he realized that he really wasn't interested in her or any other female.
He had only ever been in one relationship, with Cedric. Which started in Third Year, after his one failed match. He'd woken up in the Infirmary in the middle of the night to see Cedric over him. He had been checking to see that he was okay after his fall. After that one thing led to another and he received his first kiss while in the Infirmary. They become a couple.
One that was swiftly added on to at the end of the year by Sirius. Who Harry fell for the moment he saw him, love at first sight, even while believing he'd betrayed his parents. Once Harry learned that Sirius was innocent, he was ecstatically happy. And he helped his love escape while also arranging a meeting.
A week later,Cedric met Sirius and fell for him to. Sirius told them that the were a bonded trinity, what muggles call soul-mates. Expect they were heart-mates to. Nothing would be able to separate them. Not even death for if one died both die. Harry was deliriously happy. For finally he had someone that was wholly his.
The three of them become lovers that night and thus become one together. They were joyously happy together for the next year, even with the Tournament. The came together almost nightly thanks to Cedric being a Prefect. So they were happy.
Until it all came crashing down around them with Cedric's death. Killed by Wormtail. Harry lived up to his title of Boy Who Lived and survived the impossible again. Living past his Bond-mates death. Sirius survived because of Harry. Harry's grief was profound and his power so vast he created a Miracle Child.
Miracle Children were extremely rare, the last known one being Merlin himself. They were created out of pure Love and Magic. Of grief so strong the witch or wizard needed a part of their lost love.
Harry's grief was so strong that he created Miracle Twins, something that had never been done before. A boy and girl. James Cedric Sirius Potter-Diggory-Black and Lillian Cassopedia Harriet. They were a part of all three of them.
Over the next year, Harry clung to Sirius desperately until he to was taken from him. And he once again survived once again a Miracle Twins were Selena and Elena Catherine
After the death of his last Bond-mate, he gave up. Longing for death. Until Dumbledore came to him and convinced him to get vengeance. Which he became solely focused on, Riddle had to die. And he did.
Harry had rid the Wizarding World of their greatest mistake. And it only cost him his Bond-mates/his children's fathers, several friends, his backstabbing mentor and his innocence.
So Harry took his money, his children and his godson and left Britain forever. Completely unaware of what his life would become and completely uncaring.
The years that followed Harry leaving England behind were spent wandering the world. First Europe then Asia then Africa then the Americas before finally returning to Europe. Harry choose Italy to settle in, it having been his favorite place by far. And the children all loved it. Especially Jamie and Cassie, now seven. So they settled into one of the Potter estates in Florence and began their new life.
It would be another year before anything happened that was even worth mentioning. Harry was in Voltera, looking for a potion ingredient, when he ran into him. And thus his life was changes forever. Cauis. One of the leaders of the vampires. And the moment Cauis saw Harry he felt an instant connection. One he had never felt before and one he had no intention of losing. So he went after him with every intention of changing him. Only to find himself floating in the air with a wand at his heart
And Harry spoke."Why are you following me, vampire?"
Cauis looked at Harry and spoke. "Because you are my mate."
Needless to say Harry was shocked and exclaimed. "WHAT?"
The next few hours were spent talking to each other and they compromised. Harry would agree to date and Cauis agreed not to turn him. Which wasn't really a great compromise as the Voltera had an agreement with the Wizard World, no turning unwilling. So they began to date. Slowly. A year after they began, they finally slept together then another six months later, Harry actually allowed Cauis into his home and introduced him to his children.
A full two years after they met, Harry was actually thinking about spending an eternity with him. And then, once again proving the universe hates him, Harry was attacked before he could react.. And dying even faster. Cauis found him and fell to his knees dryly sobbing as he knew he was far to late. Harry's heart would never beat long enough for the change. Harry used what was left of his strength to gently touch his face.
And with his last breath Harry spoke one word, one all important word. "Sorry."
Cauis let out a dry sob and cupped his face."You have nothing to be sorry for. I was to late. It is I who am sorry. I love you Harry."
With that Harry took his lat breath and Cauis let out an agonizing scream and clutched Harry to him. Cauis knew once beyond a doubt that he couldn't live without Harry. So even as he mourned he was trying to work out how to convince Aro to let him die. And then his world altered again. For Harry took a breath. Cauis startled then clung tightly to him.
And asked one simple but meaningful question. "How?"