The song "In Vain" by Jazmine Sullivan explores the emotions and thoughts of a woman who is reflecting on a past relationship and expressing her feelings towards her ex-partner moving on with someone else. The lyrics convey a sense of hope and longing as the singer expresses her desires for her ex-partner's new relationship to be everything she couldn't provide. She hopes that this new person fulfills their needs and keeps them satisfied, and that the sacrifices made in their previous relationship were not in vain. The chorus suggests that the singer acknowledges the possibility that her ex-partner and their new love interest may be meant to be together. However, she struggles to fully accept this idea and questions if this new person is truly worth the tears and years of their past relationship. The singer expresses frustration at her ex-partner's refusal to acknowledge her pain and asks them to stay and witness her emotional turmoil. Overall, the song delves into the conflicting emotions experienced when a person sees their former partner moving on. It explores themes of hope, longing, and questioning the value and meaning of their past relationship.