The INFJ Typology

I never feel like I'm myself, only some eminence that happens to congregate around this body. Like this body is something else entirely. I look in the mirror and see an alien, I feel like an alien. I don't feel like I belong in this body, and it's awful. I can't look into a mirror and see myself, I just see something that happens to be where I am. What is this? What causes this? Do any of you experience this? This feeling felt stronger as I grew older, and now I just look into the mirror and...