Of course it's up to you, but I think it's a good thing to know whether you are or aren't on the spectrum. I was diagnosed as an adult (40s), and honestly I wish I had known when I was your age. I went through a lot of emotional frustration because I knew I was "different", but couldn't figure out why. So I kept trying to just fit in, and pretend that I wasn't different, and it never worked. Just made me more frustrated. Had I known that I had high functioning autism, I'd have been able to deal with things better, I think. Also, in cases where I had friends who were a little confused about me, but who still wanted to be friends, it would have made it easier for them too. When I would make a weird comment about something, it might have been easier for friends to understand why I wouldn't see what's weird about whatever it was I said. Too complicated to really explain, but I know I have a much easier time now in social situations. If I get all screwed up in a social situation and say or do things that other people think are weird, I can get a good laugh out of it by explaining about the autism.
And more importantly, I don't have to feel bad about myself for not understanding body language, and for the other things that were handicaps in the past.
Charles