New here, help needed.

I could do with some advice please. I have recently been diagnosed, I'm 43. Since my diagnosis I have told virtually no one. I didn't have friends anyway but now find myself reluctant to even to talk to anyone at all, even just a  conversation. How do I get myself out of this, I am feeling isolated, lonely and have realised that I actually don't have any friends at all I am scared if people know my diagnosis they will just be polite and 'friendly' because of it. I know a couple of people have done that to other autistic people I'm aware of. Sorry for the long post.