How to differentiate social anxiety and Fe inf?

Hi INTPs! That's a good question, I've always had doubts about this. I wanna know how to differentiate the two and know when it's one and not the other, bc Fe inf in IxTP is always stereotypically portrayed as social anxiety, fear of interacting etc, but any type can be like that lol, so how do you know when it's not Fe inf?

Goddamn, so many flairs btw 😭