I was lucky they figured it was her and not me.
Why do you think that was so lucky?
She just had to take that last hit.
You should confess if you were really the person who did it. Letting other people get in trouble is an immoral thing to do.
Nah, she's a good pothead. She won't get in trouble.
Don't assume she won't get into trouble. You should take care to make sure blame isn't put on people that don't deserve it. You shouldn't be getting people into trouble if you can help it.