Yup it gets easier. It never goes away but it gets easier. Our oldest did move out and moved almost 18 hours away. I always hated that musty "boy" smell from his room and believe it or not, the room is spotless now but there are still clothes in that closet that have that smell. I have caught myself going in, opening the door, and just reliving his presence in my house.
Disrepectful, nasty, surly, growing up......they are struggling just as we are. They aren't "kids" anymore but not quite ready to be "adults" yet either. Hang in there, wipe your tears and enjoy the times that are good. Those are the ones that you will go back and play over and over when he moves on.