I'm of the "you only live once, so go for it" school of thought... particularly as I was far too fogeyish in my 20s.
However....
You have other options beyond selling the place, particularly since you intend to return to it. You could re-finance and get some of your equity out, go travelling, and rent the place out in the meantime. Perhaps not as much to play with, but a fair bit. In the meantime, your renter pays your mortgage for you.
When you are ready to return home, you can.
Mind you, when you said the city is destroying you, I thought you were going to ask about moving out of Calgary...
However....
You have other options beyond selling the place, particularly since you intend to return to it. You could re-finance and get some of your equity out, go travelling, and rent the place out in the meantime. Perhaps not as much to play with, but a fair bit. In the meantime, your renter pays your mortgage for you.
When you are ready to return home, you can.
Mind you, when you said the city is destroying you, I thought you were going to ask about moving out of Calgary...