Hi i have an 18 year old son and we get on brilliantly together. We have a good bond. I have noticed a problem recently where he might stay at his friends house Friday night and I may not see him until Sunday. I know that's normal for an 18 year old. The only problem is that come Saturday morning I start to get very anxious and I keep looking out the window and checking my phone to see if he is on the way home.I am anxious all day Saturday and eventually he normally comes home Sunday. When he comes in the door my anxiety completely disappears. I am not actually worried about him  as he is very street wise and sensible. The reason i am anxious is because I keep wondering what he is doing and who he is with and what is he talking about. I feel left out is what I am trying to say. I don't like that he has all these new friends and this exciting time ahead of him. I kind of want to keep him to myself to be honest. I need help in changing my thinking as I know it's a bit skewed. Thanks