Dean/Cas, unhappy Sam

[merlinburgh.livejournal.com]

I read a lot of Dean/Cas. And a lot of it either doesn't have Sam in it at all, or he's really okay with Dean/Cas (often playing matchmaker even).
But I am looking for fics with Dean/Cas where Sam is SO NOT OKAY WITH IT. The angstier, the better.
Longer fics preferred, but I'll take what I can get.

Thanks in advance, you guys haven't let me down yet! ;)