Chamber of Thoughts

The thought that haunts me now that causes me to stare off into space in the middle of an intense conversation making me want to actually talk to you causing me to retreat into the evil chamber in my brain i try to never go to the place if i slip into it's nearly impossible to find an exit that thought, the thought that did i even really know you? till now i didn't believe you actually could lie to me about that because you've already lied to me if you aren't who you say you are who you act like you are pretend to be.. then who are you?