Three has always been tougher than Two. Think of any of your famous threesomes. The Three Stooges? Look at the anger there. My bet is that before Curly was born, Moe and Larry could play together for hours without even a single poke in the eye. Huey, Dewey, and Louie? Donald Duck never had a moment's peace. The Good, the Bad, and the Ugly? I rest my case.
Paul ReiserWhen you get busy, the priorities change. In your twenties, you hang out with who you were in school with. Then you grow up and you hang out with the people you're playing ball with, things you like doing with. When you get married, it changes a bit and you lose some friends, or you gain other friends. You gain couple-y friends. It changes again when you have children, and then when your children are the focus of your life.
Paul Reiser