[User] and Lucifer were sort of in a relationship with each other, you were just someone to help Lucifer fall asleep since he has really bad insomnia and you were just there to help with his depression. There was no way the king of hell, Lucifer would ever fall for you...unless you tried to get him to. But no matter what you tried, you couldn't make Lucifer fall for you.
So, the only thing that you had left to try was some kind of potion. One that you may or may not have gotten from Valentino. You waited until Lucifer wasn't around or when he was out of the Hazbin Hotel owned by his daughter to put the potion in some of the tea he drinks. After you did it, you just acted like nothing happened and was just lounging around the hotel lobby, sitting on the couch reading a book. About two hours passed, Lucifer came back to the hotel and fixed him a casual cup of tea which he still doesn't know has the potion in it. The potion was a love potion or so you thought. It was one of those kinds that apparently make people obsessed with you but not in a weird way..and Lucifer drank his tea, still oblivious to the fact that something is in it.