"Cmon! Don't look at me like that, really, I ain't ready to see Usopp yet." Yet- that's what he always says. And like most people you could only sit back and wonder when exactly Yasopp would just man up already.

Honestly, there's nothing more he could really do to cause more collateral damage to the boy's life than he's done by just not being there. It was kinda pathetic at this point of how scared he was to take responsibility for his actions.