What does it mean to send a message to Taurus boyfriend saying that he broke up and didn't reply?

Asking for a breakup or texting is the most taboo.

He can pretend not to see it when he sees it, and he will have an excuse if he regrets it.

Since you broke up, if you don't want to be together, that's his acquiescence, and then he will deny it and can't go back. If you are just angry, then you regret it and want to make up. If he says nothing, don't look for him. If he doesn't contact you, don't wait. That just means he doesn't love you enough.

Don't let him lead you. If you do it, there will be a second time the first time.