My 15-year-old daughter, who has always enjoyed a great relationship with her 17-year-old brother, is very upset when he is on the computer playing games with his friends. She says she misses him. Today we came back from a visit at a friend of hers and as soon as she noticed he was “unavailable” due to being in the middle of a game, she “lost it” – ??? How much of this is hormonal and how much of it is a deep pain of feeling the loss of a deep friendship?