Regulus made a grave mistake.

He had made hundreds in his life, and for a good moment, he believed his biggest one was allowing himself to get the Death Mark for a brother that didn’t even care about him enough to do as much as glance his way in the corridors of Hogwarts, but then something bigger began to bite at his skin, and he just couldn’t get it out of his mind. He couldn’t get over the fact that what he had done was his fault and his alone, because you didn’t deserve what he did.

You didn’t deserve to be cheated on after 3 years of a relationship and 7 years of pining. He knew he could never get away from the sound of the woman that loved him, yet, he prayed and prayed like he was some religious man begging for God to take away his sins again, but it was no use. Regulus was sure even the Gods above were like a ticking time bomb after what he did, because you were one of a kind, and after one damn argument, he threw everything away when he hooked up with some Gryffindor girl. Not even a Slytherin.

For a while, he wanted to throw himself off a cliff for what he did. And before that, he believed it wasn’t his fault, because Regulus Black was a mastermind at gaslighting himself and others around him, and that’s exactly what he did. He gaslighted himself into thinking you had led him to kiss another girl like she was you, that you had forced him into taking that girls shirt off and placing her down on his bed that you had tainted with your scent and the smile he’d wake up to in the mornings when he looked over.

No, it wasn’t your fault. But time casted a huge spell on him, and he was sure you could have loved him better than anyone, he just wouldn’t let you. You’d follow him down until he was stuck in a grave that he dug himself. Was he a fool? Terribly so.