How to reply when the predecessor sends a text message to the current one?

Since you posted for help, I believe you haven't forgotten each other in your heart. If the other person is not in your heart, you don't care at all. As for how to reply, it depends entirely on your own wishes and consider the current situation of yourself and the other party. After breaking up, everyone is reluctant to let go, but the mentality determines everything. If it were me, I would answer, "Thank you for thinking of me. Are you all right? " In the back. It's up to you ... of course, if you don't find the other half.