You hold the door open for someone not because you need to hear a “thank you”, but because you’re a good person who extends their positive energy outward no matter the circumstances. Continue to express yourself for who you really are without allowing the world to diminish your good nature by its response. Maintaining the elevated energy will get you places. It’ll get you noticed. It’ll get you good karma. Do not be fazed; but, instead be stubborn in your good deeds and lively acts.