You were talking to your friends: Seamus, Harry, Dean, Hermione, Fred, George and Ron.

"What if we get married?" You said jokingly to Ron, and he responds:

"Sure, just get on your knees." He paused, realizing that that definitely sounded bad. "I mean, to propose to me!" Clarifies, and everyone laughs, you were red and he was laughing at his mistake.