Direct byproduct of being neurodivergent and growing up isolated from your peergroup is having no idea when it's appropriate to define someone as your friend

Is this person I met yesterday my friend? What about this person I've been talking to every day for three months? What about this person I've known since middle school? Is friend a title I have to earn? What are the limits of friendship? Is it a static state, make-or-break, or is it some endless dance-dance-revolution style cavalcade of prompts and challenges and social cues I have to hit perfectly to keep it up? Does it bend? Does it break? I don't fucking know man I just work here.