[If a person has to actually proclaim they're not nice, then usually there's the possibility that it isn't one-hundred percent true. But like hell will he even bother making that remark by this point.]
It really must be some kind of wonder that you're even still alive at all if you seriously let such small things from the past get to, and stick with you as much as it seems to have.
I'll be good, then, and do just as you please and seek out information elsewhere.
[His words mostly dry, because really, what a stick this guy has up his ass.
With a dismissive wave he brushes past him, continuing in the direction he had been heading in.]