DB, go watch a movie. Join some activity or class that is completely out of your comfort zone but you have been intrigued by it.
Get enrolled in courses on coursera or edulix, something so different from your specialty that you have tons to learn with it.
Plan your days alone to the minute so you hardly have any time to brood or miss your S.

Really like how you say loving her from far, far away. Distance and time are the key ingredients for all our sitches.