One of the many lessons you may learn in life is that you, as a person, are an amalgamation of many different things: some good, some bad. The defining characteristic that will decide the outcome of the rest of your life will, on a recurring basis, be your ability and willingness to acknowledge which parts of yourself that currently define you, are parts that need adjusting in order for you to change for the better.
It is not a matter of abandoning who you are today; it is a matter of redefining who you will be tomorrow. Recognizing flaws in your own character and nature is the first step you need to take if you wish to become a better, more capable person. Change will come to you in life whether you want it or not; it is up to you to decide what to do with it.