hey little chinese boy!!! can I call you that "little"? oh just kidding!!!
So what did you do to your friend? Why did you suppose to hurt him? Actually i mean if he is your best friend, or just friend, and you don't want your friendship over, so why did you do that for? Just think about it, wujunmin. You apologized him, didn't you? and he didn't forgive you?
Well, the problem is you can't study anything because you always think about what you did to ur friend. If you thought it was awful to forget it, so let tell some one or whoever it is about what it happened. Then you'll be fine, i guess. Because i was at that time, too. I had it too. Then i told my sister or my best friend about it. Then i'd be pretty good after that out of my mind.
Hope you'll be great.