Lonely For Her by Jack's Mannequin reflects themes of longing and heartbreak. The song delves into the emotions of missing a loved one and the pain of separation. The lyrics convey a deep sense of yearning, recognizing the void left by someone's absence. A poignant moment in the song is when the singer expresses a profound sense of loneliness and the struggle to cope with it. This track captures the universal feeling of missing someone special and the emotional struggle that accompanies it.