Has anyone walked around (their home, work, mall, etc) and felt that their environment isn't real? Well, felt that nothing is real in general.

I feel that everything is not real, yet I know it HAS to be real.

I don't want to ask my coworkers because I don't know how they would react if I told them. Sometimes people don't believe me.

I wouldn't say things are "fake", per se, but it's more like, "is this real? This doesn't seem like it's part of my life." Like, I'm living in an alternate reality.