2. They set realistic expectations for each other and for the relationship.
Expectations are important in a relationship. They always have to be managed in a healthy manner. When there are unreasonably high expectations in a relationship, it could lead to eventual disappointment and resentment.
3. They always maintain a mutual respect for one another.
Respect is the foundation on which any relationship is built. When two people don’t respect one another, then it’s practically impossible for that relationship to flourish in a healthy manner.