I know that feeling. I felt the same way just before DD arrived. I was so excited about meeting our much wanted baby but I was so, so sad that it was the end of DH and I as just a 'couple'. I quickly got over that so I suspect I'll feel much the same about our next baby (only it would be affecting our family of three ) but as everyone else has said, it sounds like you quickly get over that feeling.

We all understand where you're coming from. Enjoy those last few days with your DD but don't be afraid, the precious times are only about to get better