What does it mean that my boyfriend suddenly said I was tired?

It depends on the circumstances under which it was said. If it is normal contact, it is nothing to say that he is tired. Maybe he has been under a lot of pressure at work recently and wants to go to bed early. If you say it during a quarrel, "I'm tired" probably means that he is tired in your relationship! A little tired. But you didn't say that breaking up proved that he still had room for redemption. You should find a suitable time to talk to him about your problems. It's good to change your nature, but it's only the rhythm after breaking up.