I don't have a lot of answers, but I have been DBing since last August and the bomb was a year ago.
1- I"m not a good one to ask re: OP. I have limited experience. WE both dated outside breifly last summer. I still had a lot of anxieties since I don't know when (or if for that matter) it ended. But I didn't deal well. I cried, called friends, panicked...but then I'd get busy. As long as I was busy, I could get through. If I sat still, I couldn't stand the obsession and pain. I didn't sleep well - so a lot of coffee and exercise too lol.
2 - I decided we were piecing when H started attending MC with me. Things have moved in positive directions since then (three months) but still no reconsiliation. But the fact that he goes to MC each week and deals with our issues - and he really is dealing with them - really trying to listen and change as am I - signified piecing to me. He hasn't fully committed to me or moved back home yet, but we are rebuilding trust and "seeing how it feels".
3 - I'm still confused on this one. I did so much pursuing early on that I'm completely scared to ask H for anything now. I let him pick. I don't know if I'm right or wrong. I just don't want to be hurt again. I don't call him, I don't ask for his help. He'll give it when he's ready. He comes when he's ready, he shows up when he's ready. At some point, I'll make bolder invites, but as recently as a couple months ago he declined my invite to a party, so I"m laying low.
He did give me a birthday card and present without asking.