I took the keys from H shortly after he moved out. Since my kids are little, we have a schedule as to when I expect him to come over. I leave the back door unlocked if I know I won't be home. There have been times he's locked out and I know he's upset but he tries not to show it.
As for the departures. I'm not going to say they get easier. There will be days it's easy and days it's not. But just like we digest all this the good days become longer than the sad days.
I would suggest to ignore when H talks about his future plans as a bachelor/single dad and when he discusses money. Let it go. I found out later on that my H would say these things so that I wouldn't be hopeful that he was coming back. (however he was hopeful to return)
Enjoy the moment. Consider having something to do right after he says goodbye. Record your fav show. Get in your hot tub. Knit. Read. Journal...
M 42 H 39 T10 (-2yrs separation) S8 D5 DD 7/30/11 (EA&PA) Reconciled 6/2013 Separation in works 1/2017