I know a girl. When she came home, I told her to send me a message when you came home. She said yes, but she didn't send me a message when she got home. What do you mean?

There may be many reasons why she didn't send you a message as promised. Here are some possible reasons:

1. She may have forgotten her promise, or she may have been too tired and busy to send you a message when she got home.

She may not want to disturb you. Maybe she thinks you are already busy, or she doesn't want you to worry about her safety.

She may not want to keep in touch with you. Although she agreed to your request, she may have changed her mind, or she doesn't want to keep in touch with you for other reasons.

If you are worried about her safety or want to make sure that she has arrived home safely, you'd better call her directly or send a text message to ask about her situation. If she doesn't return your messages or phone calls, maybe you can contact her in other ways, such as through social media or asking others for help.