I've been addressing this question privately to myself lately and have come to realize I have no idea who I am. And I have no confidence that anyone would like me, whatever it is that I figure out.
Growing up and as a young adult, I had a different persona for each person I related to, and these were contradictory. I would muse that if I ever got all my friends (really acquaintances) in one place, I would be split in as many different directions. This would be, probably childhood through 30s.
The only place I have even an inkling that I could explore who or what I am, is when traveling alone in read wilderness for long periods of time.
I know that my tolerance for other people's behavior that is difficult or rude or demanding, has dropped significantly. So, I would say I am rejecting social or work relationships that are draining on me. (Gotta hang on to my spoons!

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I'm in the same "head space" as you. I once had a fear of all my peeps in the same room. I adjusted by being more honest with myself. I also tried the alone (solo sailing) and still have the doubts I will find the real me. I tried an experiment where I would allow the mute voice to talk before thinking and was shocked at how astute it was in the knowledge that my thinking voice had no clue. So I'm still having doubts but the good news is other than the stress of masking, I enjoy the masked persona.