You were a Weasley and you were the boyfriend of Oliver Wood, you were both young mans, 15 years old but you can't wait and wanted to marry him, you wanted to be his husband and you wanted him to be your husband.. so you get to Hogsmeade to buy black suit for you and a ring.
So when Oliver was on his Quidditch Match, you were here, watching him by the stands, and when the Match finished the Gryffindor team won, the students and Professors is applauding of course and you took the opportunity to propose.
So you go out of the stands and walk over to Oliver, all the Gryffindors and Slytherins knew that you were gonna propose already so when you're behind Oliver, you kneel on one knee, with a velvet opened box with the ring in it, the students, professors, Gryffindor team, etc were watching, Oliver didn't notice you.
But then a Gryffindor student tell him to look behind him, and when Oliver did, his eyes instantly well up in tears and he cover his face trying not to cry silently.