He sobers slightly (further) at that. Shrugging for a moment, because he hardly thinks here and now is the time to get into what he really thinks about himself. That there are reasons that he doesn't give anyone much of a chance, and he can only imagine what Lancelot might think of him if he knew. Knew that he didn't really consider himself worth befriending. Convinced that in all honesty getting to know him is more of a burden than anything, a curse, and most of the world is better off without it. Look at how much trouble he's put Lancelot through already.

"I recognize that I'm not very promising friend material and have decided to spare them their efforts," he explains instead. Which is the truth of course, as far as Faolan sees it, while also managing to keep the self-deprecation to as much of a minimum as he can.