Disclaimer: If the Potterverse was mine, things would have gone very differently. That said, many thanks to JK Rowling for letting us play in the world she created. It's one hell of a sandbox.
"DING!"
The door of The Three Broomsticks chimed as Parvati entered and found Dean sitting at a table in the very back of the pub.
"So, have you had any revelations since the last time we saw each other?" Parvati asked, her eyes twinkling with mischief.
"No, that's why I asked you," Dean snorted. "You're the one who has the whole "second sight" thing going on. You should be able to tell me what he wants."
Parvati scoffed. "You know it doesn't work like that. And you're the one who knows him best! It can't be that difficult to pick an anniversary gift. Just think about what he likes."
"We've been over this," Dean groused. "He blows things up for a living, and so I can't really buy him job related stuff. He also wears really old clothes for work in case something happens to them, so it won't do any good to buy him a new shirt and whatnot. He doesn't like to read, so books are out. I guess I could do something standard like chocolates, or I could even pick up something from Fred and George's…"
"Ugh, no. You guys have been officially together for a year now. Chocolate is fine for a first date, not a first anniversary," Parvati asserted, folding her arms across her chest. "I know what your problem is-you're being overly practical. You're thinking too much about what he could need. Focus on what he might want."
"Well it's not like I'm going to find any dragons or muggle dynamite for sale!" Dean exclaimed.
"Have you looked?" Parvati shot back.
"No!" Dean half-shouted, and nearby patrons shot him death glares for disturbing their nice, quiet lunch hour.
"Okay, new tactic," Parvati declared. "What are your schedules like together? Maybe we can think of something that you could do together."
Dean sighed. "We hardly see each other during the week. One or both of us work late a lot of nights, and we just never find the energy to pack a bag to pop over to the other's flat."
The Indian girl snapped her fingers. "That's it! You ask him to move in together!" Seeing Dean's shock, she quickly added, "If you're ready for it, that is."
Dean shook his head. "It's fine. We've actually been talking about it recently, but nothing concrete. I guess I could go look at a few flats and see if I could find one that would work for the both of us…"
Parvati began to bounce up and down in her seat. "And you could wrap up the key in a cute little box and make it a portkey so that it takes you both there when he opens it, and-"
Dean shot out of his chair and pulled his former classmate into a quick hug. "You're the best Parv. Gotta run! See you soon!" he called over his shoulder as he headed for the realtor's office.
A week later, Dean and Seamus were portkeyed into a cute two bedroom cottage in Holyhead. Seamus was shocked but thrilled when Dean told him that he had already put down the deposit for the house. It was still in Britain, which made traveling for work easy, but it was less than 150 km to Ireland, so Apparition and portkeys to Dublin weren't considered international travel by either ministry. There was a beautiful back garden with plenty of room for flying, and they had a beautiful view of the ocean.
Seamus was touched by the obvious care and thought Dean had put into choosing their new place, and he didn't have to think twice about Dean's offer to move in together. He was so ready to turn that house into their home.