I really miss mine too OP. This is her final year - she's 17. I miss her more this year than I did the last three years - it seems to get harder and harder, which I didn't expect.
She's home for her first long weekend tomorrow and I can't wait.
To answer a couple of questions...
Other than working overseas etc is the usual reading o send kids to boarding school due to them aspiring to be performers? Or are they actually better schools, due to no good schools nearby etc? Do they suit the academic children better and allow them to reach universities for the elite?
In our case, the local school was the second best school in the state, and DD was still bored shitless despite being in all the talents programs. The best school available in our state is a state boarding school. She expressed an interest, went to the open weekend, declared that she'd found her people, and they accepted her. She's never been happier than since she went there. Academically she's been challenged there in ways she wouldn't have been at home. We do live in a fairly poor rural US state though.
I'm curious about how friendships outside of school happens. Do your DC have schoolfriends over to stay in the holidays? Do they go and stay with schoolfriends? Do your DC get bored during the holidays?
During the holidays DD catches up with her old schoolfriends from when she went to the local school, and also gets together with boarding school friends. Many live near enough that she can see them easily, and some will do sleepovers. She also had a summer job and made friends through that. She can drive, which helps.