The once again empty nest

Well, DD has returned to college, and it was hard to say good-bye, but, dare I hope, a little easier?  Not much, but, a little?  I fussed over her, made her food, and felt like an active mom once again. 
Then I got busy listing on Ebay, etc. trying to convince myself it was a regular day.
Oldest daughter came over with her husband, and we had a nice family dinner.
This gets easier, doesn't it?  Eventually?
No whining, honest.  But, a hollow feeling by my heart.