Remember this is all part of life. It is never easy but he needs to be on his own to grow and you have done your job getting him to this point in life.

With that said I miss both of my boys and we are currently living with one of them. We bought a house together almost 15 years ago - we live in a separate In-Law-Area and my son and daughter in law have the main house. Even living under the same roof sometimes we can go a couple weeks without seeing him. This is somewhat intentional because we know how important "separation" is. I would never want to live in a house (as an adult) where I spent every hour of every day with my parents and I am smart enough my kids don't want that either. On the "flip side" it is nice knowing he is only about 50 feet away if we need him for something and he feels the same way about us living here.

Be sure to take the time to visit him often! Don't let life get in the way of at least doing that.

Best of luck to both you and your son.