The answer is passionate love.
Companionate love refers to a deep, affectionate attachment we feel for those with whom our lives are intertwined. It is characterized by mutual respect, attachment, affection, and trust. It is typically less intense than passionate love and is more about long-term commitment and companionship.
A romantic relationship is a broad term that can encompass various types of love, including both passionate and companionate love. It refers to a relationship between two people who are emotionally and often physically intimate, but it does not specifically describe the intense longing mentioned in the question.
Passionate love is characterized by intense emotions, sexual attraction, anxiety, and affection. It involves a state of intense longing for union with another person, which aligns with the description given in the question.
The beautiful-is-good effect is a cognitive bias where people tend to assume that physically attractive people possess other socially desirable traits as well. It does not relate to the emotional and physical longing for union with another person.