我说我爱你信吗你爱她对吧
[wŏ shuō wŏ ài nĭ xìn ma nĭ ài tā duì ba]
This phrase translates to “Do you believe me when I say I love you? You do love her, right?” It conveys the speaker's suspicion and insecurity in their relationship, as well as the sense of jealousy and self-doubt.