If you think yourself as a loser, do u expect me not to call u a looser? no way, it cannot be.

Try one thing. Try making mistakes. I mean knowingly. Making mistakes knowingly will not make you feel like a loser. Start in your friends circle. Like, when you are with your friends, jokingly say साथि हो, मैले पादेँ है । even though you didnt do. that might embarrass you, make you go red, but you will not feel the same if you say it next time. Start with such safe mistakes/jokes/situations where you will go red but not harm yourself. Invite such situations, invite to learn, to get over it. That way you will learn how to tackle such nervousness.