Permanent feelings of alienation accompanied by the necessity of masquerading as an actor- whilst everyone else always seems to know the life script by heart- are definitely the crux of my struggles with autism.
I would not be surprised if you were on the spectrum. There are quite a few useful questionnaires and tools online that are identical to what they will give you at the psychologist's, if you're curious and wanting to know more about how you'd go about getting a diagnosis for official records.
There are a sizable number of autistic people on this forum. Once again, not really a surprise considering the nature of our condition. Our entire perception of the world around us is fundamentally different compared to a neurotypical experience. Especially if you have bothersome sensory issues and heightened sensitivities.
A lot of people who are higher functioning seem to get by faking it till they make it, that is, embracing their atypical traits and weirdness until the act inspires a sort of confidence. For people who have noticeable speech issues, like I do, that is not so feasible.
I wish I had any sage wisdom or solutions for you, but all I can say is that it takes an extraordinary amount of resilience for you to keep up the song and dance amidst being ostracised and knowing deep down that you don't quite fit in with the collective.