My oldest current friend is from 10 years ago, though we do not really talk much since he lives in Washington and I live in Colorado, we both have separate lives, etc. I tend to not make, or keep, friends for that long. I have another friendship that is about 8-9 years old and then my wife who I have known for 7 years. Other than that, people tend to come and go easily enough. I'm fine with that.