I'm looking for a Dean/Cas fic where Dean and Cas are together and the only part I can remember is that Dean almost hits Cas (I think they are in bed together at that point, but maybe not) and Cas tells Dean that he'll leave him if he does. Dean immediately backs down and feels shame. I think he might be afraid of becoming like John, but Cas assures him he's not like him. That's all I remember of the fic.

Edit: Found in comments

If you guys know of any other fics that deals with Dean hitting/almost hitting/hurting/emotionally abusing Cas, can be AU or not and in whatever setting), destiel, gen or even wincest if Cas is a major part of the story, and then feeling guilty afterwards, please rec them. I do need Dean to feel guilty afterwards, so no 5.04 fics with a non-caring Dean, please.