Hmm, in junior high we were supposed to have a friendship class in Australia and the pupils were supposed to exchange letters, but nothing ever came of it for me at least.
I did have some pen-pals I got from magazines and comics and the FBs (friendship books where we wrote our names and addresses and our interests) we sent around via letters. Throughout the years from I was 10-11 and up to my mid 20's I had a lot of pen pals; of course most of them disappeared after a few letters, while some lasted a few years. Those I actually was able to connect with would last 5 years almost on the dot. Then they'd just stop writing.
I never met or wanted to meet any of them. Some would have been possible and 2 wanted to, but I didn't.