I think people get very "busy" and we fill up our time until so much has passed that we say to ourselves "oh my goodness, I haven't seen so-so in a very long time" and only then do we make the attempt to get together. Why does this happen? I have friends out there that I haven't seen in months, maybe years. How does that happen?
Meeting up with friends for lunch, for drinks, for bowling, for whatever is always such a good time I really think I should do it more and not worry about how busy I am. A guy I once knew well used to say "you can sleep when you are dead"...and so be it! Less sleep and more time spent with friends.