"Bobby, Im sorry." Crowley was close to tears. He messed up, and now everything he worked for was gone. He had sent himself to hell for Bobby, and he still couldn't get him back.
Bobby crossed his arms, totally indifferent to Crowley's pleas. "Before I died, you walked out on me. I took care of you, hid you from the boys, and you walk out on me! Just... No" he wanted to take Crowley back, but he had hurt him too much.
Crowley was getting desperate. He was going to get sent back to Earth any time now, and he wanted to make up with Bobby first. "I know, I was an idiot. But please, I Love you. I don't have much time, self-exorcisms don't last long."
That got Bobby's attention. "Self-exorcism? You didn't."
Crowley nodded, tears now streaking down his face. "I had to. I had to see you again, to tell you Im sorry."
It broke Bobby's heart to see his Demon like this. He pulled him into a tight hug. "I love you. Don't you /ever/ think you have to do that again, ok?"
Crowley shook his head. "I need to be with you. I don't care if it hurts me."
Bobby held Crowley at arms length. "Show me the mark." Crowley obeyed, shrugged off his jacket and rolled up his sleeve in order to reveal a Devil's Trap seared into his forearm. Bobby let out a long sigh. "When you get back to Earth, find Sam and Dean and tell them to kill you."
The Gates of hell opened, and Crowley could feel himself getting pulled away from his soul mate. "Bobby! I love you." He couldn't resist any longer. A moment later he was being hurtled towards Earth.
A single tear slid down Bobby's cheek. "I love you too..."