Yep, Edz and Dale pretty much hit it on the head.
Met my best mate in 1st year uni, he then dropped out and we lost touch, as you do. That was 1977. Fourteen years later (1991) he happened to spot me on a tram, on a line I rarely used. We were both married with young families, and have always managed to stay in touch since then, despite him having been in Brisbane for almost 20 years. No contact for a while, then a call out of the blue from one to the other when the other just happens to need it. We have both been through some pretty rough times and know that there is nothing the other wouldn't do if needed. While I have a number of close friends, all any of us need is one 'dinkum' mate.