What do you mean, the ex didn't return the message?

The failure of the predecessor to reply to the message may indicate that:

1. She may not know how to reply to you, or she is not ready to face you. This may be because she has some negative feelings about your relationship, or she hasn't figured out how to deal with your relationship.

She may have lost interest in you, or she thinks you are no longer important. If she has started a new relationship, she may find it unnecessary or uncomfortable to contact you.

She may not know how to deal with your relationship, because she doesn't know whether you can continue to be friends. She may feel confused or uncertain, so she chose not to reply to your message.

4. She may have hacked your WeChat or phone number, which means she doesn't want to have any contact with you.

She may just be too busy to reply to your message. This doesn't necessarily mean that she has lost interest in you or that she doesn't want to contact you anymore. She may just have no time, or she has put her priorities on other things.

Please note that these are just some possible reasons, which may not be applicable in all cases. Everyone's thoughts and behaviors are unique, so it's best to make a more specific judgment based on your relationship and the specific situation when you break up.