Send the girl home at night. What does she mean by texting her when she goes home? We've only known each other for a month. Who can tell me?

You think too much, and people let you go home and send her a text message, indicating that you arrived safely. She cares about you, perhaps out of the concern of her friends. If you get home, send a message to tell her that you are home, don't worry. See if she will continue to talk to you or say that she will go to bed early. Whether you like it or not, it will take some time to come to a conclusion. That's not what it means now.