If your bad reputation has spawned from something that puts a damper on your life, then maybe it should be removed, bad reputations usually have some truth to it.However if your rep has been created from something that should not be chastised, be your self and those who doesn't accept you for you don't deserve to be your friend anyway. I know this is easier said than done but pretending to be some one you are not will make you very depressed and lonely.Just be truthful!