How does The Vanishing end?

In the ending of "The Vanishing," the story concludes with the protagonist, Rex, discovering the truth about his missing girlfriend, Saskia. After a harrowing journey, he learns that she was abducted and buried alive by a man named Raymond, who reveals his actions in a chilling confession. Rex faces a moral dilemma and ultimately decides to experience the same fate as Saskia, leading to a haunting and ambiguous conclusion about the cycle of obsession and loss. The film leaves viewers questioning the nature of love and the lengths one might go for it.