Not all romantic relationships can be considered to possess complete love. It was Yale University psychology professor Robert Sternberg whose famous Triangular Theory expounded upon the three integral components of love.
First of all, a couple must exhibit (1) Intimacy, which is described as the closeness and openness between them. This is exemplified in best friends who have no reluctance to share their concerns, weaknesses and dreams. They accept each other without judgment. Communication is the necessary key to intimacy.
The second component is (2) Passion. This is the physical attraction between the couple. It is the desire for physical closeness exhibited through hand-holding, embracing, kissing that should eventually lead to sexual congress. This attraction is necessary because it magnifies the bond between the couple.
The third essential component is (3) Commitment. This is the decision of the couple to stay faithful to each other. It is the continuing choice to remain loyal exclusively with the view of maintaining the relationship.
It is necessary that couples examine their relationships whether or not they possess Intimacy, Passion and Commitment. Absent any of these, the couple cannot claim to have Complete Love. And an incomplete love is almost surely expected to fail. Couples are therefore encouraged to nurture all three components in order that the relationship remain healthy and lasting.