Dreams about burying oneself can be quite significant and may symbolize feelings of being overwhelmed, a desire to escape from certain aspects of life, or a need for transformation. In the context of your ex-husband's dream, it might suggest that he is grappling with unresolved emotions related to your past relationship or is feeling trapped in his current situation.

The graveyard can represent endings or a place of reflection on the past. This dream could indicate that he is processing feelings of loss, whether it's from the relationship or something else in his life. It might also reflect a desire to bury old feelings and move on.

Encouraging him to reflect on what aspects of his life he might be feeling buried under or what he may need to let go of could be beneficial. Understanding the emotions behind such a dream can lead to personal growth and healing.