Gosh, this thread should be renamed the official Dawson & Andie unappreciation thread
Dawson finds out about PJo in 3x20 and I think he doesn't care if they were only dating a week before they told him, one month or even one year, who cares ? In 3x18, Pacey attempted to tell him on their camping trip but didn't find the courage after Dawson reminded him how Joey meant for him so the thing is Pacey alreadly knew how much it would be devastating for Dawson, he totally knew