I know what you mean, because the majority of my problems have simply been shyness and lack of confidence, being introverted, and as I've got older certain 'traits' have become less apparent. The way I see it, you aren't necessarily AS or NT - those are just words and definitions, when in reality the mind is such a huge grey area. I got a diagnosis when I was 11, and that helped in terms of school, teachers weren't as harsh on me and were more understanding, but a lot of the problems I had then I don't have now. And a lot of the more 'autistic' traits like getting extremely upset in crowds and obsessions with thomas the tank engine I had when I was younger, and now I don't have those. I don't think anyone truly 'grows out' of AS, but certain traits do come and go.
Everyone has traits of AS and autism, that's why it's called a spectrum - there's no fixed places, just some people may be slightly further up the scale. My mother has certain traits, my father does, and so does my sister, but none of them would get a diagnosis simply because those traits haven't affected their lives in a detrimental way, like they did for me at school. Try and be proud of being yourself whether you have AS or not. If the professional opinion is that you do have it, then it will certainly help, because people will be able to look and think 'ahh, so that's why she does such and such' and they will be more understanding and empathetic to your situation.
I try not to worry whether I have AS or not, because it's such a pointless argument seeing as how it's all semantics when the mind is such a complicated thing - all I know is that it helped with other people understanding where I was coming from, and people were a bit more accepting of my shyness, and it gave me the time to come out of my shell on my own without pressuring me. I'm still shy, but I've got better over the years because people weren't always on my back about it. Just try and make the best out of your life and situation and be proud of what you can accomplish, regardless of any label that might be applied to you. Regardless of whether you have a diagnosis or a certificate, you do have problems, and coping with them and doing well despite those problems will be something you will look back on later and be pleased with yourself for.
As for your friends, well I know this is a very cliche thing to say, but if they truly are your friends they won't outcast you for your beliefs or views. And a lot of the time tbh, they just might not be interested - I have friends who I wouldn't dream of talking about my music to, but I'd feel okay talking about politics or philosophy, it all depends. But I know that the few I consider truly good friends wouldn't change their opinion of me just because of a view. They may disagree, but if they are good friends they won't mind. Unfortunately lots of people don't live up to the expectations of being 'good' friends, but it doesn't mean you have to cut off contact with them, especially if you feel you'd miss their company, just find someone else to talk to about those things you feel they'd not like you for. Sorry for the complete ramble, haha.