It sounds to me like your friend has gone somewhere with his parents. The office is unlikely to provide you with any information as it is none of your business, and you are not entitled to that kind of information.
May I suggest you spend less time looking for answers to your friends absence, and more time listening to your English teacher. If your current ability with grammar and spelling at the grade six level is acceptable to your teacher, you should find another teacher.
Now go do your homework and clean your room.
RTR