Why does it matter if he sees you DB'ing? Why do you think for one second that DB'ing is about getting him back? We have talked about this.
In the dating world they call it "building attraction" it is things you do in those brief moments as you are getting someone to like you. Why is it different with a past? Do you not think that when you walk around with a big smile on your face and truly being happy that it won't get back to him? What happens when it does?
"I am really struggling these days and do not know why."
It is your mind!!! That is why!! This is why GAL, Resting, Eating.. all that stuff is important. Should I give you a get a life task?
"Yes, I do, the emails back and forth filled me with hope when right now there is none. I am going under here....blargh"
I seem to remember someone telling you there was not much substance in those emails. That person also understood that you have to make the choice on whether to continue them or not. It is going to sound silly.. but I can type until I am blue in the face.. until you choose to listen and understand then you can change it!
Relax Eat Think Act normal React.. Smartly. Do something different. Emulate. Do Work.