I wear a lot of masks too... and yeah, they're second-nature and I can't really separate it from my "natural" self.

It's incredibly frustrating or disheartening sometimes, because I don't really know who I am. But I know who I've made myself, and sometimes that's alright with me! I can list off things about me that I really believe are ME... like my preferences and skills. But my behaviours are mostly fake... but really... it's just self-taught which is how I see it when I'm in a positive frame of mind.

How to start showing more of you? Well, start with the people you're closest with, and try to open up a bit more. Just little bits if you're worried. Hell, even talk with them about how you have so many insecurities and feel like you are wearing masks all the time (if you've got people you feel really close with anyway). Just start small really, and pick out the things about you that you think will be compatible with each person. (eg..... I really enjoy asking random questions like "what superpower would you pick?"... but I only do that with people who I think will be receptive or tolerant of it. Other people I'll slowly expose my sorta-mean sense of humour (usually self-defacing) but again... it's only with people who I think would be receptive to that.