This is likely the number #1 problem for former JWs.
I find that the older one is, the more difficult it is to make new friends, real friends. Other people already have established social circles and have no room for newcomers. They are at capacity.
As a JW, all you had to do is show up. You are automatically trusted and "good association". Of course, this sort of 'friendship' is the equivalent of Monopoly money...once the game ends, it ceases to have value.