Simon Cowell and his girlfriend of six years, Terri Seymour, have broken up, a rep for the American Idol judge confirmed Saturday.

“Terri phoned Simon and finished it in September, about six weeks ago,” says Cowell’s rep, Max Clifford. “They are going to remain close friends. Simon thinks the world of Terri and that isn’t going to change. He also understands her reason for ending it.”

“In the past Terri has said that she wants kids but that just isn’t Simon,” Max adds. “Nobody else is involved, certainly not on Simon’s side.”