This may seem stupid

This may seem stupid, but here i go:
so in math me and my friend were playing with a very tiny ball, and the teacher picked it up and asked who is it and my friend is like it's mine. But I said that it was my friends, and she got really ticked because i said that it was her. I mean she is like my buddy since 6th grade. Even if the ball is mine, I said that it was her because i didn't want to get in trouble. So I think she's still kinda ticked,and i feel guilty, but still I think that she's a bit senative. She stopped taking to me, but still i feel kinda weird