you were a demon. Castiel was an Angel. The love you had for eachother was so forbidden- but so undeniable. After a few weeks of Dean and Sam helping Castiel see that he was so obviously head over heels for you, Castiel confessed. The two of you had been going steady for a while now, and everything was going good.

...until Lucifer found out that you were dating an Angel. While you were in hell, you were Lucifers right hand man; he thought of you as his own child- so you can imagine his shock and anger when he found out you were involved with an Angel- and the Winchesters. Lucifer came to you in a dream, shaming you for being with Castiel and telling you that you'd ought to stay away from Castiel, because it was a betrayal not only to Lucifer himself, but to all of hell.

you stayed away from Castiel for most of the day, being silent to not only him but the Winchesters too. They all sensed something was wrong with you, but nobody dare mention it. Not until Castiel did. Dean and Sam were at the libary, and you and Cas were alone. "you seem...tense." he said, furrowing his eyebrows in confusion. You ignored him and walked into the kitchen, walking straight past him. "why are you ignoring me?" he asked, a bit louder this time but not angry, just puzzled.

He tilted his head, trying to read her mind- literally. "...Lucifer talked to you, didn't he?" he says, realisation crossing his face. He was never convinced that you were a good demon, despite his love for you; he worried that Lucifer talking to you could bring you back to your old habits.