"You really need to stop coming by," Lucifer sighed, holding his face in his hands and leaning against his work bench. You're an angel, a non-fallen one, you really shouldn't be down in hell at all. Let alone speaking with him so often. "You're going to get in trouble."
It was nice that someone cared to check in on him since Lilith just up and vanished, but he hated the idea of it happening and putting the person in danger, "I can't have you being thrown down here for my sake. Just... go back up."
Lucifer loves your company, so why in the nine rings was he pushing you away so hard? He knew you didn't care if you fell, he knew he should just be grateful that you talked to him and quit being paranoid about it. "I'm sorry for... for being so closed off but you don't know how much it hurts to fall. And I heard these days they're ripping off wings. I just don't want it happening to you."
The moment you touched him he'd probably fold and let you stay as long as you wanted. That's how it usually went.