I'm not really sure of who many REAL friends i have, but i have a handful of full-trusting friends who im sure wont let me down. 3 of them, i met them on primary school. Even tho there was a period where we barely seen each other, we still invite ourselves to go party, go drink a beer etc. The contact between us is not forced even tho our lives have gone different ways.
Another of my friends i've met was at highschool, formerly he and i disliked eachother, but with time we had mutual interest and eventually become really good friends, i think he is the guy i trust must things in my life maybe.
One of my friends i met her while she was girlfriend of one of my friends, she seemed pretty cool and we started talking, we could be talking for many time. I saw her as a friend and only that obviously because of my friend :p. But she's still the kind of friend you could text message or phone at 3 am to talk about anything.
Right now, im in college and i have "pontential" real friends, but i have experienced that when you dont have the same interests (like going to same school) contact begins to lose and eventually they fade out. Yeah im still a bit nostalgic about my Highschool generation :p