There are no rules for friendship. It must be left to itself. We cannot force it any more than love.

Love is flower like Friendship is like a sheltering tree.

But friendship is the breathing rose, with sweets in every fold.

Friendship is always a sweet responsibility, never an opportunity.

Instead of loving your enemies - treat your friends a little better.

Friendship at first sight, like love at first sight, is said to be the only truth.

An excellent man he has no enemies and none of his friends like him.

Be courteous to all, but intimate with few, and let those few be well tried before you give them your confidence.

Friends show their love in times of trouble, not in happiness.

Caring for but never trying to own may be a further way to define friendship.