Dreams can often reflect our subconscious thoughts, feelings, and experiences. In your dream, several elements stand out that could provide insight into its meaning:

1. Identity and Perspective: The fact that you dreamed you were a black kid may suggest that you are exploring different perspectives or identities. This could indicate a desire for understanding, empathy, or a reflection of your own experiences with race and identity.
2. Conflict and Frustration: The interaction with your friend’s mom and brothers highlights feelings of being misunderstood or judged. Their negative comments may represent external criticism or internal insecurities you are facing in your waking life.
3. Destruction as a Response: Setting the place on fire could symbolize a desire to escape from a situation that feels oppressive or to express your anger and frustration. It might reflect feelings of powerlessness or a need to take control of your environment in a dramatic way.
4. On the Run: This aspect of the dream signifies feelings of anxiety or guilt. You may be feeling overwhelmed by a situation in your life and are seeking a way to deal with it.
5. Seeking Help: Telling your teacher about what happened indicates a need for guidance and support. It suggests that you recognize the importance of seeking help when faced with challenges.

Overall, this dream might be inviting you to reflect on your feelings of frustration, identity, and the importance of seeking support in difficult times. Consider what situations in your waking life may resonate with these themes and explore healthy ways to address them.