If basically getting blackmailed into a hug and then being painfully socially awkward during said hug is almost the top of Bro's Happiness Echeladder, Sufferer just feels even worse for him.

"I know, it's just... you, and Dave, and Dirk... you're all so alone. You're so used to being alone I don't think any of you even realize how lonely you really are." Dave is probably the least like this, with Dirk somewhere in the middle, and Bro? Yeah, Bro is the worst.