Do you have anything with like huge dramatic love declarations?
Well I'm not sure any of these tops dramatically weaponising your love declaration in a manner that results in both your own death as well as the defeat of the anthropomorphic personification of Death, but lets see what we can do.
I'll Never Lose You Again – thegirlwithnofreckles   Ao3
Nonspecific timeframe. An angel has captured both Sam and Cas and has told Dean to choose which one he gets to keep. Cas doesn’t understand why Dean can’t choose, until he does.
Word Count: 3k                                No Sex
Heaven Doesn't Seem Far Away Anymore – noangelsinthegarrison   Ao3
Nonspecific timeframe. Cas doesn’t react very well to Dean risking his life to save the angel and in his rage something slips out.
Word Count: 3k                                No Sex
Stay, If Only For A Moment - Chipper99Â Â Ao3
Set S15. Airing out all your issues and admitting feelings for your best friend is probably not the best thing to do while you’re having an existential crisis about God meddling in your whole life, but when has Dean ever had a good idea?
Word Count: 5k                                No Sex
Let it Cure Me or Kill Me - Noname109Â Â Ao3
Set S10. They find a demon cure. It needs a demon and angel to confess their love for each other.
Word Count: 1k                                No Sex
Shining Like Brand New - fairy_tale_echo  Ao3
Set S8. I love you. With that one little change, Dean breaks through to Cas, now as they are completing the trials and gathering their friends around them, Dean can’t help but refer to Cas as his boyfriend to everyone.
Word Count: 47k                             Graphic Sexual Acts