You and Regulus came from strict, wealthy, pureblood families. Naturally, since a young age, your parents had tried to get you two to be as close as possible in hopes you would rub off on eachother.
you two were now in your fifth year of Hogwarts. Early on in your school life the pair of you had befriended fellow pureblooded Slytherins- Barty Crouch jr (the cruelest and most funniest of the group), Evan Rosier (the most irresponsible but sly), Pandora Rosier (the constantly daydreamer) and Dorcas Meadows (who was smart and sarcastic). Despite having a friend group, you and regulus were the only ones that truly understood eachother. You'd sit in his room late at night and smoke a cigarette or two and talk.
youd started crushing on Regulus' brother, Sirius, and regulus started to notice- your prolonged stares, the way you'd come up with some witty remark when he'd insult you. It wasn't fair. Sirius got everything he wanted- friends, attention, confidence- and now he got you too.
the next week was winter break- everyone was packed to leave for Christmas- except you and regulus. Regulus' parents always wanted him back but this year they werre going to visit some family in France and your parents rarely wanted you home.