FAKE-ing happiness

dunno why, i wont act i m so sad in front of many ppl!!
many ppl say i m strong and tough, and always smile =)
after i cut my hair, many ppl cannot recognize me in the 1st few second!!
but they say there till can recognize me afterward, recognize me from my smile ^^

I always show my happiness in front others... but sometime i am not!!
cover myself is the best way to let ppl dunno whether is sad or happy?!

FAKE?? fake similing??
no!!!
just HIDE it!!