Someone who has lack self confidence will try to be someone else that she feel more good so people didn't notice it. You act like you have it even you don't have it. But, that's ok if you didn't try to be someone else. If you already on your way to build it, you just try pull yourself together and say that you have more personality and emotion that will make you have more confidence. It's ok to be your own pace, just not to try be someone else. It will more harder to be yourself than be someone else..