When our kids are grown and they have to leave us, we have to let go. When I had to let go my son for the first time, it was hard. But I tried to stay cool. I always thought of him and would call him without fail.
But gradually, I got used to it and guess I was already able to let go. When the next one were to leave us for university, I was better prepared. I didn't feel sad or anything at all. Furthermore, it's better this round as I can talk to her through skype.
So I guess most of us parents should be able to get accustomed to it when our kids have to leave us for further education.