Far from being a weakness, homesickness is a testament to our evolutionary success as a species. Psychologists call it a “biological alarm system.”

Eventually, the acute pain of homesickness fades into a duller, more manageable "nostalgia." You stop comparing your new city to your old one and start seeing it for what it is.

Everything is new and exciting. You are posting photos online. The adventure has begun. You feel no pain. You might even feel guilty later for how easy you thought it would be.