Well, yes. A lot.
I used to hang out constantly with this one guy who lives down the street, we were best mates and all. Basically when either of us had something interesting in our house, like a cool game or whatever, we'd practically be living in the same house.

But things change, he went to another college and I only saw him every once in awhile.
He also spent some time working at the same place as me after that. It was great, but I kinda feel like we don't have that much in common anymore and I hate it....I guess it's been 7 years since we "stopped seeing eachother" so to speak.
The second would be these dudes that I used to hang out with in my later college days.
I don't lose any sleep over those guys, I sure had some fun times with that lot but frankly they were a bunch of tools. I simply couldn't stand the fact that if there was ever anyone else around, they'd start acting totally different towards me. I just stopped seeing them.
There's also a few other people from college that I regret not being able to hook up with anymore. One dude who I basically spent all my time with the first college years. He's just so totally awkward to talk to, I still see him every day in the train home but frankly the awesome we once had is kinda gone.
There's also this girl who I used to like back in those days. We still get along but we never seem to be able to stay in touch. Like, as hard as I (emphasis on the ME in I) try.
Then there's a whole bunch of people from high school or whatever the correct term would be (I have no effing clue how the British or US school system works

). This is the place where I went after the college-thing-whatever.
The worst really, is the fact that my 4 best mates are probably going to be living more then a 100 KM from here within 1,5 year. 3 of them have already been accepted into the school there and are planning on renting an apartment there after summer, the other is joining them next year once his school is over......Sure, the train system here in Holland is good and all and I guess I should get my license so I could actually visit them if I wanted but damn....it's never gonna be the same again, living 5-10 minutes away from each other.
Hell, I seriously never really noticed how many people I've seen come and go....I wonder if I'm just bad at keeping friends....