Having overcome his fear of life. Perhaps naivety is your subconscious protecting from adversities and negative sides of reality. Understand, what you refuse to see the problems, they disappear. An effective way to change personal circumstances for the better are action.
Admit your naivete. Understand the causes of another failure. Don't blame only others, and critically treat their behavior. Imagine what would have happened if you had acted like an adult.
Get rid of the image of a little girl. If you chose naive as a strategy of behavior with the opposite sex, most likely, your actions are doomed to failure. Your image can attract a young man only at the stage of flirting. For a serious relationship a grown man want an independent, smart and appropriate life partner.
Understand that such a trait as naivety can only pricked others. If you want people to take you seriously tried to win your friendship and respect your opinion, you need to get tough, shrewd man. Only then will you become a full-fledged member of the team.
Keep in mind that naivety can be dangerous. Do not trust strangers, because some of them may use you for selfish purposes. Respect yourself and don't let others to ignore your interests for profit.
Listen to your intuition. Your subconscious mind accumulates many years of experience. In difficult situations, your brain sends a signal, as it should do. Do not neglect this feeling, it can help you make the right choice.
Learn. Learn to take a lesson from their own and others ' mistakes. Read the classics, describing the people and exploring the motives for their actions. See films about the lives of ordinary people, about their relationship. Carefully study the surrounding. Read some books on psychology of personality. All this will help you to be deceived.