Bea, Sit back and listen. I think you are doing the right thing by responding back when he posts. You are his lifeline to the present. He's still floundering in murky water and sees you there on the shore as his lighthouse.
If you ignore him, he will become desperate, i.e., as he did before. In his mind, he needs to know that you are still out there, even though you have moved on.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.