I proposed to get back together and sent a text message, but he didn't reply. Does this mean that he has refused?

I wonder which one of you broke up first! If he brings it up, there is no hope. Because if a man changes his mind, it is generally difficult to turn back. I guess there must be other women outside. You can ask his family or friends what he thinks, or who he has been in close contact with recently. Then you will understand everything!