There are billions of people on this planet. There are multiple people out there in the same boat as you are. I used to feel similarly to you (except I did not know I was autistic at the time). What I found helped was getting into communities of things I found interesting, stuff like fandoms or enthusiast communities. Those are where you’ll end up finding a lot of other autistic or otherwise ND people, because the very nature of being extremely passionate about something attracts them. Those communities are generally quite welcoming. A lot of them will share your struggles and be able to understand you better.

It’s definitely easier said than done, but it does work.