Love is a basic psychological need for college students in early adulthood, and although some college students have beautiful visions of love, their behavior is still relatively passive and they are accustomed to waiting. This study used semi-structured interviews to explore in-depth the proactive behavior of college students in love and its influencing factors, and applied the three-level coding method of rootedness theory and NVivo software to analyze the interview data. It is concluded that proactive personality, relationship attitude, social attitude, and relationship experience all affect college students’ proactive behavior in relationships; there are obvious differences between the two sexes in relationship attitudes, and the influence of social attitudes on the proactive behavior of the two sexes is different; relationship experience is positively correlated with proactive behavior.