Maybe in a year, or half a year, or even a month, Brother Zhai might meet a person he really liked, and he would realize that his affection for her was that of the care and concern for one's relatives and younger sister.
Brother Zhai had helped her so much. If he could find his happiness, she would be more than willing to let go. She hoped that Brother Zhai could be with someone he really liked.
However, she was human as well. She also had feelings and would be hurt. She could let him go, but she was not sure whether she would be happy when the time came.