(I do factor in my model of how much they like me, as I believe people are less likely to lie to people they like; but this doesn't affect their epistemic hygiene, their background knowledge, their skills at rationality, or their susceptibility to fallacy.)

I could conceive of situations where friends would be more likely to lie than strangers. A friend may lie about their actions if they care about your opinion of them and not care as much about the stranger's opinion of them.

However, it may very well be that people who I like practice better epistemic hygiene. Indeed, I've found simply being around people who are more careful thinkers forces one to switch into a more careful thinking mode, because if you don't, they'll tear you into little tiny pieces. However, that probably doesn't matter that much since detailed interaction can probably get you a better idea of how the person thinks more than this rough heuristic.