Well, I do firmly believe that the older you get, the smaller your friend circle gets... It was my 30th a few weeks ago, and the numbers have dropped drastically in comparison to my 21st and that seems to be the trend now adays with the majority of people in my age range.
Obviously life gets in the way from meeting people, and when you work full-time, at the end of the week you just want time for yourself to relax with a bottle or two of wine haha
And I 100% agree about the fake/self absorbed/gloating people! hahahaha