Dreams about funerals often symbolize the end of a chapter or a significant change in one's life. In this case, your son's dream involving his ex-girlfriend may reflect unresolved feelings or the process of letting go. The fact that she was standing in the hole, looking up at him, suggests that he may be grappling with his emotions about their past relationship and the need to move on, even if he doesn't want to return to her.

The act of going through the motions of a funeral, despite her being alive, could signify that he is mourning the end of their relationship or the idea of what it once was. The tears upon waking indicate that this is an emotional topic for him, and it might be helpful for him to explore these feelings further.

Encourage him to reflect on what he truly wants and to acknowledge any lingering emotions he may have. This dream might be a catalyst for him to process his feelings and ultimately find closure. It could be helpful for him to talk about his feelings with someone he trusts, whether that be a friend or a counselor.