After years of having studied myself, gotten a diagnosis, and gone on to study the larger autism itself in a professional sense, each day I'm learning more and more how individual we all are. How nothing is set in stone and, while our genetics plays a role, that it is not the entire determinant to our own personal adaptability.
More and more do I view autism as one end of a general human continuum, and people towards the autism end tend to have more severe expression of these traits which, at their root, are very human. The people who have the more severe expressions may find the diagnosis beneficial.
My advice is that if there are aspects of autism which ring true to yourself, then use them for what they are. Let them give you some guidance in better understanding yourself, or at least attempting to understand yourself in a different light, and if that improves your life at all then the time and consideration has not been wasted, no matter what any other person might tell you.
There is no "autism" when it comes to genetics, epigentics, or behavior. They are simply trends in embryonic development and human behavior. They may have some similar root causes, but ultimately each person is exceptionally unique and cannot be defined or boxed in in such a way. It's taken me a number of years to learn this about myself. While initially the label helped me to gain focus, after a time instead it became a box which I have since shed. I still realize there are issues I deal with that may be more classically considered "autistic" and may have some common root causes I share with other people who have similar experiences, but a label doesn't make me something more or something less than what I was before. Instead now I tend to view each ability or deficit in its own light and try to accommodate on that level.
I am me; I'm not "an autistic". And you're you. You have a unique approach to adapting to life and the experiences you've had, which is a culmination of your genetics, epigenetics, and learning in general. You are neither predetermined nor a blank slate but in the gray area in between. If there are aspects of autistic behavior that seem to reflect some of your own behaviors, it isn't a bad thing to consider them and to interpret them in such a way. I just hope that you may use the guidance as a tool to understanding yourself and perhaps finally giving yourself permission to have the unique set of abilities and deficits you as a human being have without shame or embarrassent, but to never let such a label be a reason for not growing into the person you strive to become. I hope that, regardless of any label you might take on, that you will strive to value yourself as you are.
Welcome to Gestalt.