Anyone else relate to feeling invisible? How has it changed you?

I think I am invisible. It makes sense, then, that I have a pretty fake personality depending who I am talking to. I know what others want me to say or act like so I automatically put on that face a bit. Even though the real me is just silent, maybe crying inside, maybe nothingness, maybe deeper and darker and colder than a cave. Sometimes I act happier than I truly am. I smile and laugh a lot at people's jokes. I giggle at everything that isn't meant to be funny. It just doesn't really matter to anyone who I really am.
Anyone else relate to feeling invisible? How has it changed you?
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