Because I didn't reply to my girlfriend's message, then I called my girlfriend and sent a message. She didn't answer the phone and didn't reply to the message. What should I do now?

First of all, you need to apologize to your girlfriend and express your apologies and concern. You can send a sincere message telling her that you realize that your behavior is wrong and hope to get her understanding.

If she still doesn't return your text messages, you can try to call her or video, or go to her directly. When you call or meet, show your sincerity and seriousness, apologize to her and express your concern.

If she still doesn't want to communicate with you, you need to give her some time to calm down and then try to contact her. In this process, you need to show patience and understanding, and don't push her.

The most important thing is to realize your mistakes and try to correct them. If your girlfriend finally chooses to forgive you, then you need to respect her feelings and try to avoid making the same mistake again.