Maybe you shouldn't for a while. I mean its Adam's last week soon, everyones a little on edge, everyones saying things they don't mean. Maybe for the next while you just ignore it from Dean. Let him work himself out and go at it later with a clean head. Make the break, just for now.
Probably, it doesn't usually get this bad though does it? You're not usually this bad. Have you had any lately, even a drop