It's hard when a loved one makes a decision that really changes the dynamic of the family life. My son (20 years old) just went into the Marines in January. We were very close and it was very hard to let him go, but I wrote him every day which helped. He wrote me back too (I loved getting his letters) and I got the biggest hug when I saw him at graduation. He's changed some, more mature, conducts himself with a lot of pride, much more responsible, but he's still the silly, loving young man I sent away. He's made a grown up decision that will change his life forever, but he'll still be the wonderful brother you always had. Be proud! Once out of boot camp, they can have their phones to text and talk, so things will be much better.