I don't think the curse works with sibling 'love' and anyway, Dean would murder me in cold blood if he woke up with me smooching over him. Perhaps it's not literally a 'kiss' that he needs; maybe a handshake or a manly hug would do the trick instead?
I could never be that lucky.
Otherwise I'll need to find someone he loves unconditionally, who loves him back just as much. Someone who means the world to him and who he would want to spend the rest of his life with ...
I wonder if I could get the Impala down here?