Author Note: This was requested by lucifers_little_uniorn
He watched you as you talked with the Winchesters trying to form a plan to get back to your world. The archangel knew he had grown close to you. grown to love you. You loved him too. You two had actually met and fallen for each other when he was released from the cage the second time. Yeah, he was in Castiel's vessel at the time but you just couldn't help it. But the angel found himself questioning things the more he watched you bond with the boys. Did you mean it when you said you loved him? Did you really enjoy being with him? Being in his arms? kissing him? Did you really mean it every time you called him your guardian angel? Or were they just things you meant for now?
His fear of you hating him grew with each doubt. The archangel didn't want you to look at him or think of him as everyone else did. The angel started to pace around as flashes of what he feared most happening ran through his head. You telling him you didn't love him. That he disgusted you. That he was a monster just like everyone said. Anger and hurt built in him but he tried to tell himself it was just his mind playing with him. He walked off. You looked over. You had been worrying about Lucifer for a bit now. He seemed different. The boys went off to talk to some other hunters and you decided to go check on Lucifer. If something was wrong he knew he could confide in you. You were the only one he ever confided in. You found Lucifer sitting on the steps of an abandoned and half torn down house. You walked over to him. "Lucifer," you called grabbing his attention, "is something wrong?". He looked at you. It wasn't a glare but there was a bit of anger and sadness mixed in them. "Did I do something?" you asked.
"Not yet," he said staring out ahead.
"What do you mean?" you asked confused.
"How long Y/N?" he asked. The sadness in his tone pulled at you.
"How long what?" you asked.
"How long before you turn on me?" he asked. You were taken back, "how long before they make you think I'm a monster? Before you decide you no longer want anything to do with me?". You sighed and walked over to him. You very softly cupped his face in your hand as you slowly sat in his lap. His arms instantly wrapping around you.
"Lucifer look at me please," you said and he did. You noticed a single tear in his eye and brushed it away with your thumb, "I love you and I will never turn on you. I love you Lucifer and I mean it," you told him with no shred of doubt at all.
"I love you too Y/N," he said. You remember how long it took him to say that but you loved hearing it every time. The angel rested his head in the crook of your neck as you softly ran your hand through his hair. You smiled as you got an idea.
"I'll stand by you," you started to softly sing, "I'll stand by you. Won't let nobody hurt you, I'll stand by you," he lifted his head to look up at you and you cupped his face in your hands as you continued to sing. "Take me in, into your darkest hour and I'll never desert you, I'll stand by you,". Lucifer smiled as you leaned down and softly kissed his icy lips.