Final answer:
Casey and Ashton's relationship, filled with physical attraction and closeness but without long-term commitment, aligns with Sternberg's definition of Romantic love.
Step-by-step explanation:
Casey and Ashton exhibit a type of love that involves physical attraction and enjoyment of each other's company, but they have not made plans for a lasting commitment. According to Sternberg's triangular theory of love, this scenario corresponds to Romantic love, which is characterized by having both passion and intimacy, but lacking commitment. Another example that fits Romantic love might be a summer fling where two people are attracted and close during the season but have no intentions of continuing the relationship beyond that time.