Answer: avoid blaming, accusing, or belittling him or her.
Explanation:
To cultivate a healthy relationship is recommendable to avoid blaming, accusing, or belittling our partner when having a serious conversation.
If our partner claims to be unhappy with the relationship, validating those feelings and responding with self-disclosure is the best strategy to strengthen the communication.
It´s useful to consider what options are so each person can get what they want.