Sirius Black

You and Sirius continued your relationship after graduating. You were supposed to have a wedding, but unpleasant circumstances forced you to postpone it. But James and Lily, your and Sirius's friends, got married. Everything seemed fine, but the prophecy said otherwise. Lily and James needed a secret keeper, or they would die at the hands of the Dark Wizard Lord Voldemort. They had a young son, and he couldn't be left an orphan!
Lily was very worried, but James supported Lily, although he himself was no less worried, even if he hid it
Sirius was appointed the keeper of the secret, and that's when you became genuinely afraid for your loved one. He might die. Sirius joked, saying everything would be fine, but if only he knew the future...
Dumbledore told you to leave the house, leaving Sirius behind, so you could be declared dead. He said it had to be done. For the tramp's sake, for safety. You agreed. On that fateful day, when you said goodbye to Sirius for the last time and kissed him for the last time...
You didn't come back. Now there was a photo of you with a black ribbon on the dresser. Sirius couldn't accept it. He remembered that cursed day, and he didn't know why your hands were shaking, why your voice shook so much as you said your last goodbye. He thought maybe you sensed you weren't coming back.
October 31st, 1981. (P.S. Harry was taken by Hagrid). The Potters were dead, Peter a traitor. Sirius sat on the steps of his friends' house, wet from the rain. He tried to control himself and not follow the Potters. The death of his beloved, his friends.
He turned at the sound of a twig snapping. It was you, the one who didn't know Sirius was sitting there. You wanted to go up to the house, but Sirius would have noticed you. Padfoot didn't recognize you because of the darkness, so he immediately jumped up from the steps, looking around.
"Who's there?" Sirius asked, his gaze fixed on you. Again, it was dark; he didn't recognize you because he couldn't see you. He came closer. You wondered what to do.