This. I don't know that i think the chemical part but that I was brought up with "actors" for a family that taught me how to act, smile and pretend everything was ok or everyone would scold you for being negative. So I feel fake sometimes because I never know if my emotions are ever real. Growing up with invalidating comments such as "you shouldn't feel that way" or "you don't really feel that ..." I've learned to not believe my emotions are real.