The boy sent a text message saying, "What do you mean I'm home?" Please, great gods.

So you probably hang out together? Or together, because of something, he just wants to give you peace. There are no other questions. It is possible that his parents asked him to reply like this when he went out. This way, everyone will be fine, so don't worry, lest you two go out. In case of any safety accident, it is better to know it early. There's nothing wrong with that. Judging from this sentence, it may be a better one.