Wanting a diagnosis to validate myself

Hi, 

 didn’t know where to put this, so I’ve put it here, move if you like mods.

 All my life I have struggled, I have never felt like I’ve fitted in, I don’t know how to behave in social situations, I don’t know what to say, I watch other people speaking and I know that I am not like them, my anxiety is through the roof. I often have meltdowns and shutdowns, brought on from being out in public or in social situations and as I’m getting older it’s getting worse, I really need the diagnosis and hopefully some help with dealing with this

Billy