I completely hear ya. I work from home and I expect to round a corner and be tripping over her, or when I come home I expect to see her at the door greeting me, or even getting a snack in the fridge - I expect to hear her come running (she could hear a cheese wrapper a kilometer away).
It gets easier every week but I do enjoy the time we spent and am not ready to even think about getting another dog yet. On my morning walks I do stop and say hi to many of the dogs in the neighborhood and share the love! Take care brother and one day at a time!