A man's best friend is a good wife.

Under the heavens and under the sea there's a friend I don't know, who holds the right key.

A friend of mine, a friend of yours. My better half, Richard Stephen Sambora.

Neither a borrower nor a lender be: For loan oft loses both itself and friend.

You meet people who forget you. You forget people you meet. But sometimes you meet those people you can't forget. Those are your friends.

A real friend or mentor isn't on your payroll.