I also feel this sense of not belonging. Of being different. I remember over twentyfive years ago I mentioned to someone that I had always been a minority of one.
I feel like the proverbial iceberg. 10% of me relates with the world around me, the rest I keep forever hidden from most people.
While I live my life together with others at the same time I always have several other inner worlds running in parallel, which they know nothing about.

But instead of feeling sorry and misunderstood I seem to be able to turn it into a strength. I do not play along with the games of the world. Instead I am free to think and feel and perceive.