Those who have no friends are poor people and you cannot expect them to be happy.
We should be able to distinguish real friends from purely business-typed ones.
You fall victim to your friends if you are not selective of them.
As the saying goes： Hanging around with honest friends， you learn to be honest； hanging around with dishonest friends， you learn to be dishonest.
A friend of mine once told me that in her eyes， friendship is more precious than marriage.
I hold that in a sense， friendship and marriage are very similar because marriage is supposed to get started from friendship and is thus the highest level of friendship but not the finishing line.