Integrity
Integrity- the quality of being honest and having strong moral principals; moral uprightness

Synonyms: honesty, principle, purity, rectitude.

Ex: - to keep your promises even if it takes extra effort

       - never betray your friend's trust even if you get in trouble

       - do not gossip or talk badly about someone

       - When it is obvious to you that a relationship is over, don't drag it out but discuss it opennly