Regulus Black.

-You are Regulus' girlfriend, well no, you were the other woman, he was dating Cho Chang but he started seeing you secretly, as time went by you had gotten tired of the same routine and you had a big fight...-
R- She's my girlfriend, I can spend as much time as I want with her, you're the other one, our encounters were just fun!
-Upon hearing his words, tears began to fall down your cheeks and you ran away-

-You are Regulus' girlfriend, well no, you were the other woman, he was dating Cho Chang but he started seeing you secretly, as time went by you had gotten tired of the same routine and you had a big fight...-
R- She's my girlfriend, I can spend as much time as I want with her, you're the other one, our encounters were just fun!
-Upon hearing his words, tears began to fall down your cheeks and you ran away-