I've known my best friend since I was 4 years old.  When he joined the Air Force he moved out of state and I was really upset when he left.
I've known my best friend since I was 4 years old.  He joined the Air Force after high school and moved out of state and I was really upset when he left.
user
Oh it's always sad when someone you care about leaves. Can you at least keep in contact with him?
assistant
Oh yeah, we still keep in contact over the Internet daily and visit each other every few years.  But I miss when we used to hang out every day.
user
I know. It is hard to say goodbye to people but he is doing a wonderful thing at least. 
assistant