Seal's marriage to Heidi Klum might not be over -- in a new interview with Piers Morgan, the singer said ... "Is it irreparable? You can never say never."
Seal added, "Whether we get back together or not, it may happen. I can't speak for [Heidi]."
Seal admitted, he's not sure if he wants to reconcile -- claiming, "If it were that easy -- if there weren't problems, we'd still be together. That is the reality."
Seal added, "My love for [Heidi] has not waned one iota. I love her with all my heart."
Seal also commented on his wedding ring, claiming, "I'm still wearing my wedding ring because I'm still married to this incredible woman." So we gotta ask ...