Is it an Ne dom thing? Perhaps? But I think it's more a combination of things for me personally. I don't tend to get burned out by being sociable in a typical sense. I can definitely feel drained, but what I think the core of that is, is if I haven't been given the opportunity to reflect on the experiences I've had, or time to check in on myself and gauge whether what I'm doing, is in line with the bigger picture of life that I see myself in. I have goals and aspirations for myself, and sure, i love to live and seek out adventure, but those adventures are calculated and aren't without purpose for me. If I do something new, I will need time to reflect on that. Also, I feel a constant need to express myself creatively and to allow my imagination to flex once in a while to feel truly alive and myself.
So rather than being socially introverted or anxious, for me, it's more about not being able to reflect and act creatively for too long a period is what drains me, or leaves me feeling like a some hallow shell of a life. The act of socializing or being around people, isn't what drains me.