I know how hard this is. The pain of them leaving is unbelievable. Be strong. The first night will be hard. But, I did feel better the next day. Cry and come here. Get someone to come and help with the kids if you can.
I wish I had words of wisdom or some good advice, but I don't.
My H (very much like yours) is confused. I forced the issue with my H and he left. He came back the next day. But, unfortunately, there are still things to be resolved. And even though this is what I wanted, I now am questioning eveything and feel numb right now.
The indecision from our Hs does take its toll. Think long and hard about what you want and what you can keep living with.