Why didn't he reply when he sent a message to his predecessor?

When two people in love are together, they love each other to death, but once they are separated, they become each other's predecessors. Because of deep love, many people will no longer be friends, but will never contact again.

I don't know what your psychology is when you send a message to your predecessor, and I don't know what your message content is. But he didn't reply to your message. In a sense, this is the most correct way to deal with it.

He didn't return your message, maybe he didn't want to pester you anymore. If I don't reply to your message, I won't have anything to do with you again, and I won't let you have too many daydreams, so that your relationship will stop here and no other stories will happen.

He didn't reply to your message, probably because of his current position. I believe that every girl will not feel good when she sees her boyfriend reply to her ex. As a boyfriend, why do you want to make your present unhappy because of your predecessor? Right? If you were you, you wouldn't do that, would you?

He won't return your messages. It's possible that he has blocked you. He can't see your message, and of course he won't reply to your message.

Anyway, as you should not bother your ex again, it will be over when it is time to end. Let it go.