Is expecting something from someone being naive?

For example the concept of karma , we feel as we're obligated to give to something back, to the person who was kind to us.But if the person decides to break that loop...u dont get anything back. Its fine if you dont get anything back the first time but after the 10th time,when u see that even the people who have wronged you face no repercussions, so u start doing the same things. And subsequently your life starts becoming a lot better.