"Okay," he said, suddenly feeling nervous himself. Why, he didn't know--he already knew her answer, right? She was already planning the wedding. But logical thought didn't seem to do anything to the butterflies playing pass the Quaffle in his stomach. What if she didn't like the ring? What if she changed her mind and said no? "I've told you that I know you're the love of my life, and that I'm just as certain that I'm the love of yours. But my dad always taught me that actions spoke louder than words ever could." He glanced down, smiling slightly. "Actually, he usually said than shouting ever could, but...Cho, I don't care if you never cast another Patronus for the rest of your life. I want to marry you, and I want to spend my life with you, and I just know that if you'll do that, the rest will turn out right. So..."
He swallowed and lowered himself to one knee, fumbling in his pocket for the ring box. When he had it in hand, he held it up, popping it open to reveal the ring inside, a platinum band with a blue diamond solitaire in a simple setting. "Cho, will you marry me?"
"But I have a ring," she whispered after a moment, unable to pull her eyes away from the sparkly, blue diamond, even as tears began to stream down and across her cheeks. The ring was everything she had hoped for and imagined, even in the moment when she had accepted the smaller, sapphire and diamond ring. That ring had been "perfect" too in its own way, but a part of her had still longed for... this. "Oliver, you--" Sniffing, she wiped her eyes with the back of her hand before holding it out for him. "Put it on me, please?"
Slowly, he pulled off the ring with the tiny sapphires and diamonds he'd bought her in Malaysia and slid on the engagement ring. "It's a diamond--a blue diamond, though I suppose you probably know that from the shop and all." An image of the huge rock Jonas had given her flashed before his eyes, and the words kept tumbling out of his mouth. He was aware of flashes from a camera, but only vaguely. "I know it's not...I had something a little...different in mind, but we can always find something better later."
"I love it," she said quickly, dismissively. She held it up to admire in the moonlight. "I love you."
The nerves fled from his body as relief took their place. "I love you, too," he said, and without realizing when he'd stood or taken her face in his hands, he kissed her with every bit of what he'd held back the first time they'd kissed, up on a roof and holding back because she was engaged to someone else. But now...now she was his.
As Oliver kissed her, a clear male voice broke into song from somewhere near the stairs, sliding the notes of the melody every which way as if to prove that he could. Dustin Carter belted his heart out, as if he was the one who'd just gotten the girl, not Oliver. "I've loved you forever, in lifetimes befoooore, and I promise you never will you hurt anymoooore--I give you my word--I give you my heaaaaart--this is a battle we've won, and with this vow forever has now beguuuuh-uuuuuun!"
Pink cheeked, Cho pulled far enough away to look at the intruders. "An audience?" Then, in a whisper, she added, "shouldn't he be at you-know where we're going?"
Oliver's shoulders shook in silent laughter. "I dunno. I didn't arrange for him, just the photographer. And the Omnioculars. But somehow I ended up with Dustin-bleedin'-Carter serenading my fiancee."