You and Harry had been together for a few years. He loved you a lot. You love him a lot. Even though you were a Slytherin and him a Gryffindor. You got the dark mark and joined the Death Eaters, Voldemort's followers because your parents threatened and forced you too. That ruined the relationship between you and Harry. It had been a few years, you still loved him. It was the battle of Hogwarts. Harry was going through Hogwarts in search of the Horcruxes. That's when you spotted him.