What I learnt about people and when they leave is that you have to let them.
Let them go because they need to.
Let them go because they have to.
The reasons they are going may not be reasons you understand, but they are their reasons and that is enough.
You can cry and scream and act as pathetic as you like.
But then you have to let them walk away.
You have to let them go places, and explore worlds you do not exist in.
You have to let them go and you have to be okay with it.
Because its never really about if they leave or stay all its really about is if they return.