Hopefully this filled some plot holes that I left, but I'm really not going to try that hard, because then it wouldn't be fun to write this story! Besides, if you're reading that much into this story, then you have bigger things to worry about. :) Enjoy!
The Witnesses
The house was full of vampires, and Harry felt extremely uneasy. While the Cullens had assured him that the vampires would not bother him, Harry still kept his wand at the ready. He never revealed himself as a wizard, though. While it would've been a lot easier to just tell the vampires who and what he was, the Cullens had decided that if too many vampires knew of the existence of a magical community, the Volturi would catch on and find a way to get magic on their side.
And so Harry found himself constantly performing enchantments on the vampires, to keep them from asking questions. It was exhausting work that Harry felt was wholly unnecessary, but he wasn't here to spread the gospel of magic. He had also resisted the urge to use the Imperius curse on the vampires who looked at him a little too often, and who seemed to sniff the air he was standing in a little too much. After all, he had used the Imperius curse when he had first arrived in Washington, and while the Ministry had said that they received notice he was in America through Apparition, he suspected that it was in fact because of him using an Unforgivable curse. He had assumed that it was just Shacklebolt covering for him, but he had no idea what to expect when the Aurors eventually came.
Which hadn't yet happened. He had sent the owl away a week ago, and hadn't gotten a single scrap of news or a reply from Ginny. And so he had assumed that the Ministry had disregarded his plea and were sending Aurors. They, of course, would have to go through the American Ministry of Magic and obtain licenses to perform Memory charms on all the vampires that were involved in this whole situation, which would be extremely counterproductive and not to mention would make Harry's staying here a huge waste of time.
In short, Harry really hoped that nobody was coming after him, even if they were coming to 'rescue' him. On top of the stress of the unknown, Ron and Hermione had disappeared. They had gone to speak with Alice and Jasper, and never returned. After nightfall, Harry walked to the cottage to see what was possibly taking so long, and discovered his duffel bag and a note, written by Alice. He had taken the note back to the Cullens, who each took turns reading it, examining it, trying to find some hidden meaning in the words. But there was no hidden meaning, nor any hidden spell, as Harry had checked. The Cullens were completely blindsided, even Edward was shocked.
Everyone racked their brains, trying to come up with a reason as to why Alice would leave them at the moment they needed her most, and Harry tried to comprehend why his two best friends in the entire world would just abandon him, without even saying goodbye.
But Harry did not mope around, he did not waste any energy being angry at them, because he knew that whatever it was they were out doing, it was obviously just as important as what was happening here. And so he distracted himself, whether it be by demonstrating more magic to the Cullens, or helping create a battle plan. The rest of the Cullens dispersed, traveling to every corner of the globe to round up the witnesses. When the first foreigners arrived, Harry stayed in the cottage for longer periods of time, and when he came out to socialize and help with the planning, he had to make sure that every single witness was successfully under the impression that he was a necessary asset to the cause, which required a hefty amount of magic to pull off.
Harry really wished he could just use the Imperius curse.
One day, about two weeks before the Volturi were scheduled to arrive to take Renesmee, Harry was walking around the backyard, kicking rocks, completely bored. He really wanted to just pull on the Invisibility cloak and use just some basic magic, but at that moment, he heard a loud pop. He turned around instantly, searching for the source of the noise, and holding out his wand. The other vampires, all twenty-three of them or however many, raced onto the back porch, obviously hearing the commotion too.
As Harry's eyes scanned the woods, and the back of his brain sighed at the fact that he was going to have to reenchant the vampires again, he saw something that almost made him drop his wand. There was a flash of red in the midst of all the green, and Harry's jaw dropped. It couldn't be, it simply couldn't be. Harry felt a mixture of immense happiness and extreme terror. He lowered his wand, and began moving toward her.
He broke into a run about halfway towards her, and she did too, her fiery red hair reduced to a blur. The two collided, their arms wrapping around each other. Harry breathed her in, his heart racing. He held her tightly, closely, hugging her like he did right before he faced Voldemort for the last time. He loved her so much, and it had only been a few weeks, but he knew that there was a slight chance that he would be in a lot of danger when the time came to face the Volturi, and especially since Hermione and Ron left, he had felt so alone.
He broke off the hug, only to lean back and press his lips against hers, kissing her deeply. She kissed him back, her hands wrapped around his neck. Harry leaned away only to breath, and he locked eyes with hers, and smiled. She smiled back, before hitting him on the head. Harry, startled, stepped back a bit, rubbing his temple. "What was that for?" he asked. Ginny crossed her arms, giving Harry a look. "That was for being an idiot," she said.