I loved the Dean-Crowley scenes, though I think Crowley is fooling himself if he thinks Dean stopped the fake hunter from going after him because Crowley somehow has wrapped Dean around his demonic little finger. I think there were two reasons involved, one being that Dean would try to keep someone who looked like a newbie hunter from getting himself killed by going against someone considerably more powerful than your average demon (there has been some discussion as to whether or not Dean should have known the hunter was a demon but the show has often been so claustrophobic that we sometimes forget there are other hunters in the universe and, of course, we know that if someone shows up in the ep, there's some special story reason, as opposed to "real life," where people move in and out of our lives with no special importance and that this is the way the characters would see the other people in an episode).
The other is that Crowley still holds the FB, and while Dean may be afraid of what he experienced while holding the FB, I don't think he's given up on going after Abaddon as yet.
I also think that Sam's words in "The Purge" that crossed the line and stomped all over Dean's life and character--most especially the claim that Dean's only been willing to sacrifice if he didn't get hurt, which is total nonsense--played a part in Dean's decision to take up the FB again. He says that it doesn't matter what the consequences are for him and for me, that was a total reference to Sam's statement.
