If you cannot think of any nice things to say about your friends, then you have the wrong friends. Make friends before you need them. A good friend is one who neither looks down on you nor keeps up with you. If it weren't for them you would be a total stranger. A friend is never known till he is needed.
Friendship is the cement that holds the world together.
Friends are those who speak to you after others don't. The reason a dog has so many friends is that he wags his tail and not his tongue. Pick your friends, but not to pieces. A friend is one who puts his finger on a fault without rubbing it in. The way to have friends is to be willing to lose some arguments.