Possibly a very important aspect of the difference between introversion and extroversion:

The difference in tolerance for ambiguity in relational status.

A typically extroverted individual, being more oriented towards social interaction, tends to feel more comfortable interacting with anyone. This is also why they more easily naturalize the complexity of a typical social network where the establishment of a diversity of relational statuses is very common. Therefore, they see no problem or contradiction in presenting a discrepancy between the apparent level of intimacy in a specific interaction and relational status, that is, with whom they are interacting at a given moment. In simpler terms: being overly friendly with someone they have never interacted with or with whom they do not have a more intimate relationship, for example (even forcing intimacy, as they often do). The opposite can be more common the more introverted one is, where there is a difficulty in tolerating ambiguities in relational status and a preference for objectivity or clarity in defining status, resulting in a higher stress load, exactly like always "walking on eggshells"... For example, the low level of intimacy that is common with most work colleagues, especially for a typical introvert, but which clashes with the social pressure to perform affective homogeneity in this type of interaction, something that extroverts feel very comfortable doing. The difference between acting or pretending (even without being fully aware of what you are doing) and being as honest as possible.

Interestingly, it also seems to be relatively common for more introverted types to occasionally establish very satisfying momentary interactions with complete strangers, perhaps because these interactions are purely based on positive or sympathetic and objective reciprocity, without the context of implicit social laws complicating the "middle ground"...