As I grow older, I become tired.
I become tired of trying to make small talk with people, trying to make friends with them, and eventually having that friendship reduced to awkward greetings whenever you chance upon them occasionally.
I do not know what makes me feel this way.
But I honestly do not see the point of making such transient "friendships".
Maybe it's the memories that you've had with them that matters.
But what are memories when they only form memories?