Okay, one thing I've noted about INFPs and ENFPs just on this forum (something that helped me) is outside of the stereotypes that ENFPs are more assertive/use more Te/are more forceful or outspoken...is that we can really lay on the charm when we want. INFPs seem to often complain about being not being noticed as much, ENFPs might have introvert tendencies, like spending a lot of time alone, but when we come out to shine, it's just a natural talent we have to engage people ... if we're immature or amoral we can even be total snakes. We have very little problem being flirty and laying on charm, or just intensely engaging other people. LOOK AT ME LOOK AT ME LOOK AT ME. With some ENFPs they report it being effortless, even, like they're not even trying.
I think we NEED other people more too even if we don't want to be around them all of the time. Like I want external approval, and the tendency of INFPs I've observed to not weigh their Fi against any outer opinion, or logic sometimes gets on my nerves.
But I went through periods of social anxiety in my life, and that has nothing to do with introversion or extroversion.
I need stimulation and change too, like I would go absolutely mad locked in a white room with no other people or other external stimuli for a week. I think INxx types would be able to think or entertain themselves doing that for a short period of time.