"I Could Fall in Love" is a contemporary R&B, soul and a power ballad. The song is about a women who loves a guy. She is scared to be rejected by him. Because of this, she decides not to tell him. It is composed in C minor with 157 beats per minute. The electronic keyboards, Spanish guitar, and the drums is the song's background music. Selena uses the soprano voice. She has a light-deep voice and uses her emotional voice when she sings the title of the song. Trey Lorenz is the backing vocalist. After Selena sings the chorus, she sings in Spanish during the down-tempo part of the song. She goes back to singing in English. At the end of the song, she uses the melisma technique and hits a high F note.