One thing between I and friend

Mike is my best friend. He always a little shy and do not good at speaking. One day after school, Mike and I doing all the work and ready back home. I pass the basketball to him in classroom, but he misses it, then, the windows are break. I am very afraid so I ask Mike to keep secrete for me. The next morning I found Mike talks with teacher, I thing he betrays me. Then teacher tell us that is Mike done. I feel so guilty and tell all people the truth. Mike and I become the best friend again.