The difference between a boy, when it comes to befriending another, and a man is this: A boy will accept another person for who he/she says they are. A man will accept another based on whether their actions match who they say they are. The only way they are similar, in this matter, is that they are both quick to disband what they don’t want or like.
The reason why I didn’t mention women is because women hate the other individual from the start and work towards liking them through contact as well as time. Perhaps, in this regard, women have a better idea of things.