system
disappointed: My son is never here anymore.  He is growing up and going out with his own friends.  This is extremely healthy, but I certainly miss him and want him to spend more time here.
human
You hope your teens make the right choices, but sometimes even the right choices feel wrong.  He is choosing to be away with friends and not at home much.  I believe this is healthy, but I can help but want something different.
gpt
I know it is hard to start letting go, but it gets easier with time.  Don't worry, you are not alone.
human
That's what my own mother says.  In fact, she said my dad had a harder time than she did when I called and said, "Hey, I'm staying the night at so and so's, be back tomorrow."  I guess I will survive!  Hopefully he will choose to spend time here as he hits his 20s!
gpt
Yeah, they always seem to come back!  You just have to love them from afar for  a while.