After breaking up, he said not to send me messages, but to call me if anything happened. He doesn't want to contact me anymore, does he?

It's difficult to determine his thoughts, because he may have many different reasons to avoid contacting you by SMS, but he can only contact you by phone. Here are some possible reasons:

1. He wants to keep his distance: He may find it difficult to control his emotions through SMS communication, so he wants to keep his distance to avoid further warming up his feelings.

2. He needs time: He may think that he needs some time to deal with the feelings of breaking up and decide not to return your text messages in order to concentrate on emotional recovery.

3. He needs space: He may think he needs some space to deal with the feelings of breaking up, and decide not to return your text messages so as to concentrate on his emotional recovery.

He needs privacy: he may think it is difficult for him to control his emotions through SMS communication, so he wants to keep privacy and caution through telephone communication.

No matter what his reasons are, his decision may be based on his own needs and emotional state, so you should respect his choice and follow his requirements. If you want to keep in touch with him, you can try to communicate with him by phone or other means, but don't force him to reply to your text messages or keep in touch with you.