Your dream is rich with symbolism and intriguing elements. Here’s a breakdown of some of the key themes:

1. Reconnection and Nostalgia: The encounter with a middle school friend suggests a longing for simpler times or a desire to reconnect with your past. This could reflect a need for support or familiar connections in your current life.
2. Lost Direction: Not remembering how to get back home can symbolize feelings of uncertainty or being lost in your waking life. It may indicate that you are at a crossroads or experiencing confusion about your path forward.
3. Historical Figures: Meeting prominent leaders from WWII could represent a clash of ideologies or inner conflicts you are grappling with. These figures may symbolize different aspects of power, authority, or conflict that you are navigating in your own life.
4. Abandoned School: Schools often represent learning and growth. An abandoned school may symbolize missed opportunities or unfulfilled potential. It could be a call to reflect on past lessons and how they apply to your current situation.
5. Robot Mr. Beast: This character may symbolize modern challenges, particularly those related to technology and social media. The need to fight this robot alongside historical figures suggests a struggle against these contemporary issues, potentially relating to feelings of competition, pressure, or the need to assert your own identity.

Overall, your dream seems to reflect a mixture of nostalgia, a search for direction, and the confrontation of historical and modern challenges. It might be beneficial to consider what aspects of your life feel uncertain and how you can draw on past experiences to navigate your current situation. Engaging with your memories or reconnecting with old friends could also provide clarity and support.