panwatcheswrestling:

I see it like this.

For Seth, tonight was about trying to provoke Dean into some kind of reaction. He said everything he could, every barbed word he could think of–calling him a coward, comparing him to when Seth turned, calling him a lunatic again (which almost did the trick). And the silence he got was worse to Seth, because that’s basically Dean confirming his worst fears to him. 

He was hoping for an explanation. He is carrying the guilt and the pain, and Dean won’t even speak to him face to face. And the silence is worse, because it’s like Dean’s already gone. 

So Seth has to chase him down and “beat it out of him,” even if he didn’t have the heart to follow through and actually go after him tonight. He will, because he can’t just…let him go. He’s not capable of letting him go.