I've made a less than average amount of friends throughout my life so far, and I only really keep in contact with a much smaller amount than the total.
I think about every single one of them very often though. I wonder if that's normal or is it just because it's easier to remember a very small number of friends than a larger group..
A handful of years back I bumped into someone that I was very good friends with in the sixth grade. We hung out all the time and I considered her my 2nd best friend (after Jess of course)... She didn't remember me. That really sucked.
I also have a friend that I don't see anymore. He's a lot younger than myself, and got into some bad stuff for a while and disappeared pretty much. I stayed away because I could have no control over whether he did these things or not, and I didn't like to see his character change. It was a long time later, about a year or so, that I caught back up with him a bit. He seems to be doing better, but is also much different than I remember him. He seems to be way too busy to ever hang out with him now, so all I can really do is wish him well.
I wish there was a way to let all of my long-lost friends know that I still remember them, and that they really meant a lot to me when they were a part of my life.