If you want to say that an decrease in X is the sole cause of a decrease in Y, it might be a good idea to check whether there are other places where 1) X increased but Y decreased or 2) X decreased but Y increased. Different moments in time, different countries, etc.
For myself personally I have moved around a good amount, so it is naturally harder to make social connection, and even if I’m invited to social events with friends in other places it is physically hard to attend them.