"I Stay in Love" is a song by American singer-songwriter Mariah Carey, taken from her eleventh studio album, E=MC² (2008). It was written by Carey, Bryan-Michael Cox, Adonis Shropshire and Kendrick Dean, and produced by the former two. "I Stay in Love" was released through Island Records on October 28, 2008, as the fourth and final single from the album. Drawing influence from the R&B and soul music genre, the song features a piano and keyboard-driven melody, and a strong accompanying drum-beat. Lyrically, the song finds Carey getting "her cry on with the connect-the-dots break-up track." She describes the old time she shared with her love interest. She narrates that even though they said let go, and that she is aware that there is nothing left in their relationship, she still "stays in love with him".

E=MC² is the eleventh studio album by American singer-songwriter Mariah Carey, released on April 4, 2008, by Island Records. The singer began recording the album in 2007 in Anguilla, after writing and composing most of its material during and after her 2006 Adventures of Mimi Tour. Carey worked with various songwriters and producers on the project, including Jermaine Dupri, Bryan-Michael Cox, Stargate, The-Dream, Tricky Stewart, Scott Storch and Danja.