Hypocrite

emm .. now , i've got the answer ! what i've done is not hypocrite mannnn , i just wanna do my best ;D
i want to improve my true-self .

People who tell you to "only be yourself" are practically setting you up for failure 

Unless you are born perfect with the great work ethic, the looks, the athleticism, and everything else beneficial then you most likely do not go around "just being yourself" 100% of the time. There are reasons why people only reveal their "true selves" to a select group.  Now, I'm not telling you to be fake 

. I'm not telling you to be someone you aren't and make up lies about yourself. I'm telling you that being your regular self will most likely not cut it. You have to be the best you you can possibly be. Just skirting by will not help you. Join something you usually wouldn't. Become friends with that person who you normally wouldn't. Step out of your comfort zone and experience new things. Push yourself. Do better than you ever would have imagined. If your shy make it a point to be friends with everyone. If you usually hang out with only a certain type people try to hang out with other people who maybe aren't exactly your first choice friends. If you don't usually study or do your homework until the last minute then try to get all your work done in advance. Just try your bet to better than what you were before.