I broke up with my girlfriend and sent her a message but didn't reply. Is it blocking me?

I don't know if the reason why you broke up is emotional disagreement, or because there are contradictions. Whose fault is it? Are you sending a message to save this relationship now? If I know today, why should I know? It means you can't let go of this relationship. Breaking up hurts? Yes, you don't reply to your girlfriend's news because you hurt others so much that others don't want to talk to you, or you are blocked. It's possible. Therefore, when people in love encounter problems or contradictions, they should take the initiative to seek solutions to the problems, or take the initiative to apologize and resolve the contradictions, instead of breaking up easily. Is this the only way to solve the problem? Breaking up will only do more harm to both sides. Now that we have broken up, don't bother each other again, lest you get bored. Just a suggestion, for reference only.