Quote from : The White Knight Syndrome: Rescuing Yourself from Your Need to Rescue Others Book

If you have realistic ideals and can generally live up to them, your self-esteem will not be threatened. If your ideals are exaggerated and you cannot reach them, your good feelings from successes may be short lived, and you may feel that you are never good enough. The continued hope for the impossible, the expectation that you will or can be unconditionally loved and adored, is not facing reality but rather holding onto an idealized image of yourself and an idealized version of what others can provide. If this is the case, your sense of self may be threatened by shame and its resulting depression, or by feelings of inadequacy for not living up to your unrealistic ideals. A better understanding of shame may help you recognize your tendency to hide what you feel from yourself and others.