It is allowed if you lose, or you lose friends, you might even lose your temper in so many cases but you really what a good life and a life of fulfilment, don't ever lose confidence.
Confidence is like a golden ornament that attracts the world to you and in one way or another, it increases your value.
So many people today, are smart and intelligent yet they don't usually achieve their dream, it is not because the world is not fair but because they are too shy to look at the world in the face and boldly ask what they want.
Sometimes when you visit offices and top organization, you find out that those in charge are not smatter or intelligent than you but yet it seem they are ahead of you in life, let me tell you the simple secret, it is because those people have learnt how to be confident enough to go for they want.
No matter what, Always be confident.