The track was co-written by guitarist/vocalist Paul Stanley and singer/songwriter Michael Bolton. Bolton was then at the peak of his commercial popularity, and Bruce Kulick had performed with him prior to joining Kiss.
Musically, "Forever" is a power ballad. It begins with Stanley singing over an acoustic guitar intro, with the rest of the band joining during the first chorus.
The song was remixed at Electric Lady Recording Studios in New York, by Michael Barbiero and Steve Thompson for commercial release as a single. A music video was released to promote the song. It received heavy airplay on MTV, attaining the #1 position on the channel's "Most Requested Videos" show several times. The clip is perhaps the most understated video Kiss has released, as it shows the band (then consisting of Stanley, Gene Simmons, Bruce Kulick and Eric Carr) playing the song in an empty room.