Be best friends not just romantic lovers
Be a team, work together towards common goals
Have a balance between time together and healthy amount of time apart (seeing your own friends etc)
Share compatible moral values and compatible life style overall
Have common views on money and finances (lack of it often ruin the best relationship)
Both are comfortable with each other and don’t hide their shortcomings and issues from each other
Both committed to relationship equally (willing to work on it)
Enjoy each other company
Be aware of each other’s relationship needs and try to meet them or be willing to compromise if it’s not possible
Be a couple yet maintain your own identity