"Good friends are hard to find, harder to leave, and impossible to forget." -unknown

"A best friend is like a four leaf clover, hard to find and lucky to have." -unknown

"If you live to be a hundred, I want to live to be a hundred minus one day, so I never have to live without you." -Winnie the Pooh

"Best friends are the siblings God didn't give us." -unknown

"True friendship is like sound health; the value of it is seldom known until it is lost." -Charles Caleb Colton

"A real friend is one who walks in when the rest of the world walks out." -unknown

"Don't walk in front of me, I may not follow. Don't walk behind me, I may not lead.  Walk beside me and be my friend." -Albert Camus

"Strangers are just friends waiting to happen." -unknown

"Friends are the Bacon Bits in the Salad Bowl of Life." -unknown

"Friendship is one mind in two bodies." -Mencius

"Friends are God's way of taking care of us." -unknown

"If you should die before me, ask if you could bring a friend." -Stone Temple Pilots

"When it hurts to look back, and you're scared to look ahead, you can look beside you and your best friend will be there." -unknown

"I'll lean on you and you lean on me and we'll be okay." -Dave Matthews Band

"If all my friends were to jump off a bridge, I wouldn't jump with them, I'd be at the bottom to catch them." -unknown

"Everyone hears what you say. Friends listen to what you say. Best friends listen to what you don't say." -unknown

"We all take different paths in life, but no matter where we go, we take a little of each other everywhere." -Tim McGraw

"Good friends are like stars...  You don't always see them, but you know they are always there." -unknown

"My father always used to say that when you die, if you've got five real friends, then you've had a great life." -Lee Iacocca

"Hold a true friend with both your hands." -Nigerian Proverb

"A friend is someone who knows the song in your heart and can sing it back to you when you have forgotten the words." -unknown

"Most people walk in and out of your life, but only friends leave footprints in your heart." -unknown
 

*Thanks for the idea, Amy*