What is a good song about friendships that have lasted for years; especially with friends from school?

There are lots of friendship songs that are appropriate for graduation and about how even though we've finished school, the friendships will last forever. Are there any songs that would be appropriate for people who've been out of school for years, and yet the friendships are still as strong as ever? They don't have to literally mention school or college, just about lasting friendship. I'm thinking of songs similar to "You're Still The One" by Shania Twain or "Through The Years" by Kenny Rogers, expect they'd be about platonic friendship rather than romantic love.