'Come dance with me, Lav,' Seamus said simply with none of his usual theatricality and dramatics. That's when Lavender knew he was truly serious about making this relationship work. Sea just took her hand gently and led her to the center of the dance floor already filled with couples. He took her hand, and as horribly cheesy as it sounds, her heart actually fluttered and she got a warm tingling feeling in her stomach that made her shiver pleasantly. They danced late into the night, stopping only once to congratulate Harry and Ginny, the bride and groom of the hour.
Seamus and Lavender were happier than they'd ever been in ages, and when the party broke up Sea took her to his small flat to continue dancing. He had no music, so they sang—Seamus' rich tenor mixing with Lavender's clear and high soprano, their different accents melding perfectly. When Seamus commented that he felt like he was in one of those awful muggle romances, Lavender only laughed and waltzed him gracefully to the bedroom.
So what if Lavender's manic and overprotective tendencies were sometimes suffocating? Seamus needed to be grounded like this, otherwise who knew what kind of things (or people) he'd do. Seamus loved her silly sense of humour and the way she always smelled like vanilla (not lavender; she insisted he never buy her any lavender-scented products). She was talkative and a gossip like him, and while she was organized and neat, Seamus was the exact opposite. They fit together perfectly. Dean often teased Sea for still being with his clingy high school sweetheart (whatever that meant), but Seamus really didn't mind because he was beyond happy and he had someone to go home to when Dean didn't.
He didn't care that sometimes Lavender nagged him for leaving his towel on the floor, because sometimes he got mad at her when she spent all day shopping with Parvati. Maybe these things and others would destroy them later, but for now they were just enjoying life as it came; free of Death Eaters and war.
That night they danced to a different tune, softer and sensual, and Seamus realized something the next morning when he woke with Lavender hugging him tightly and beautiful blonde hair spilling everywhere. He found that he never wanted to wake up any other way with anybody else. And in the most awful-muggle-romance way, he set off later to buy a ring for Lavender to wear. Maybe at their wedding somebody else would whisper let's dance to their loved one and a wonderful cycle would begin.