If you lack self-confidence, you may across as prideful, conceited, or arrogant. Or you may behave in ways that are just the opposite. Your lack of self-confidence may come out as:
apprehension (fearing change),
resentment (despising people who have more than you do),
depression (believing things won’t get better),
passivity (failing to take initiative). or
insecurity (needing constant reassurance from others).