@Not even human
If I may, I would like to share my two cents on your plight.
For the sake of this case argument, let us disregard our ideals and appetites and focus on the facts. You will realize that what you said is a contradiction: if you have been completely honest with us, then what you say cannot be impossible.
Let us examine the two specific quotes of yours that cause me to believe this: “Before this I was an oddball geek with a lot of friends who loved life and loved my friends and family” and “What is the most important thing about being a human?... Ability to relate to others. Theory of mind. The spirit of connection and understanding that united everyone. Theory of self...Empathy... The things missing from me.“
The contradiction occurs with these two claims: (a) that you had a successful social life before the diagnosis of autism and (b) that those with Autism cannot have successful social life. The reason why both claims cannot be possible, my friend, lies in the fact that Autism is a nuerodevelopmental disorder. It exists from birth or early childhood and persists throughout the lifetime. You do not “get” Autism once you receive a diagnosis, the diagnosis only reveals that you have had it all along.
So let us put all these facts together then. You where diagnosed with autism, which means you have had it all of your life. Yet, you once had a successful and fulfilling social life. During this time, you had Autism, even though you where not diagnosed.
Do you see the contradiction now: it is not possible that Autism causes you to be unable to connect with other human beings, because for years before the diagnosis you had Autism and where connecting with humans.
In conclusion, both the claim that (a) you where able to have a positive social life before the diagnosis and (b) autism makes it impossible to have a positive social life cannot be correct at the same time. So there are only three logical conclusions to make: (1) that claim a is wrong, (2) that claim b is wrong or (3) that both are wrong. So tell me then @ Not Even Human, what is the conclusion you make of it?