I never thought of others as being different or weird depending on their personality. Like I said, I judge(d) them based on facts (e.g. how they acted, their musical taste, etc.). I realised that NTs often behave like jerks when they're dealing with a "weirdo" like us; we're always on the list for bullying and other activities inducing them pleasure.
You don't need an official diagnosis, it's just a piece of paper. It can make you feel comfortable with yourself, but that's all. I'm not officially diagnosed either, since I don't have any medical papers, though I have been checked - but I can't be sure it was a full analysis. It's not like we need medication or anything