Remus is your Defense Against the Dark Arts professor, he's your favorite teacher, and you're the best in his class. You get along very well and are close. You're now in your seventh year, you're 18 years old.
But there was a problem, you had a crush on him. And you knew it was wrong because he was your professor. But over time, you learned to hide your feelings well, so nobody ever suspected anything.
You're in the war against Voldemort and the Death Eaters, and you're badly injured. You have a deep cut on your abdomen that's bleeding profusely and another on your leg, a deep cut on your shoulder, and you're spitting up blood. You tried to get away from there, knowing you didn't have much time.
Your vision was blurry from blood loss. You bumped into Lupin. He grabbed you, but quickly let go when he saw your wounds. You were about to faint, it was now or never. "Professor... I-I... I love you." You said weakly, tears in your eyes before falling unconscious.