I can't speak for her, but perhaps she miscommunicated her train of thought. I know that I am generally perceived as happier than the average person (I am much more manic than depressed), but this does not mean that I am actually happier than the average person! My exaggerated happiness can quickly become paranoid anxiety, hypersexuality, anger, irrational needs for movement (which isn't always a possibility, since I work a corporate job and usually sit in front of a computer for 8 hours a day), etc.

While I am very often told that I have a wonderfully pleasant demeanor and am always happy, I so very much wish this were the case. I wish people could hear the screaming that goes on inside my own head sometimes.