I have a cousin who has been my BFF for 39 years. We can sit for hours and never talk but still feel comfortable. She gets me new books all the time and always picks ones that I end up loving, you have to really know someone to do that.
My brother Rick, we fought like cats and dogs as kids, but have always been close, especially college forward. Outside of relatives, I met two friends about the same time my freshman year in high school, Greg and Alvin. They live half a state away, but we try to stay in touch.
For me it's God. I am not being funny. Nor do I claim to be a Christian, but I do believe in God strongly. And He has brought me through so much. I'm not one that reads the bible or believe it is 'The Word' . . .to me it's hearsay. But I know there is a force that has helped me during the most difficult times of my life.
Those are great. Ilove hearing that people stick together just because they want to. I found, on facebook my best friend from high school. We had a MAJOR falling out after we became roomates and that is the only thing I have ever regretted in my life. we decided that as middle aged women it was time to get over ourselves and the friendship took up where it left off. We spend ages on chat on fb. So this probablydoesn't count as the longest friendship, but it is the one I treasure the most as it was lost and now it's found.