There is this space between the ending of something very special and the beginning of the next something special.
It is a tension.
Many times I feel torn. I have a hard time taking a step away from [seeing a friend, having a unique experience, fill-in-the-blank], but life has taught me over and over again that there is yet another piece of wonderment in front of me if I'll just choose to open my eyes.
You don't want to move too fast, dissolving that delicious feeling of euphoria. Yet, you don't want to dwell too long, missing all things great in front of you.
This is basically just a schmancy way to say:
The end of vacation and leaving dear friends really sucks.