text: i still feel that way because,like the text stated "you can probably tell how a friend is looking simply by the look on their face." you can also tell when you hang around a certain person everyday and they start to change and their facial expression start to change, their body language will also start to change. Just because you smile alot dont mean your happy .When you smile you muscles in your smile starts to change but that don't mean your happy your still sad. if your were to get tested on the machine they would considered you happy just because you smile alot but really you just depressed .