Hiding your tears will not make you strong, nor wiping it. Expression of anger, fear, agony, hate, misbehavior or even lie must be instantaneous, or else it may build a bitter personality trait inside you till you burst those wrongdoings happened with you or by you. You nurture good things within you, not bullshit. Learn to express it when something is not suiting your taste.
Real people never hide emotions, no matter those emotions are good or bad.