I got so drunk a few months back to the point where I was questioning reality. I honestly didn't know if I existed, if the people I was talking to were even the people I thought I was talking to, or if I was where I even thought I was. It was terrifying to be honest, but I do have a little insight into this whole self-aware stuff now. Basically, if it's there just assume it's there, even if it's not. And if it is but it's not, act like the person standing next to you so you don't seem crazy, even if he's not there. This is how I got through that night lol.