Comment by kokey

As someone who has been an expat in several locations and also divorced, I have found that it's not really due to age but down to where the people around you find themselves in their life and where you find yourself in life. When young people go to college a significant portion of them are in a situation where they would need to seek and develop new friendships. The same happens if you move to a location which has a large expatriate population. It's when you don't have your old friends around and surrounded by people who are in the same situation. That means the people you work or take classes with are also open to making friends with people they work or take classes with. Everyone also live, work and socialise as close to each other as possible, for this purpose. This is in contrast to, say, if you move to a new country or a city where the majority of the people already have established friendships and families where they live and work. These people don't live close to where they work, they live close to where it's convenient for their established friends and family. They don't feel the need to make friends at work. This makes it hard for you, as an outsider, to make friends where most people you deal with don't have that need. This changes again if you have children who go to school and you find yourself with other parents in the same situation. The same when people move when they retire somewhere.