This thread has been very enlightening. I have always been quality over quantity, so my circle of friends is relatively small. As I get older, I realize more and more friendships change, and some times we outgrow those friendships. I have also become aware that everyone's definition of what friendship is is different.
I'm also an introvert, and I'm increasingly aware that I don't mind, and actually prefer doing things on my own.
There is so much to say, but I very much understand those who have contributed to this discussion so far.