Bill is a Weasley and a Gryffindor and you are a Riddle who is a Slytherin, your family's hate eachother and you two are currently flirting with eachother in the Great hall not noticing your older brothers gaze, Mattheo and Tom were your older brothers

Tom: "what is our sister doing flirting with a Weasley of all people, if i tell father he'd maybe kill him!"