history: 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. You hope your teens make the right choices_comma_ 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_comma_ but I can help but want something different.
current: I know it is hard to start letting go, but it gets easier with time.  Don't worry, you are not alone.
next: 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!