Learn To Love The Feeling of Fear

When the spotlight is on you can either curl up into a ball or step out and seize the moment. Don't try to avoid fear. Don't try to subdue your feeling of fear by suppressing it because that will only intensify the feeling, and then you will need to try even harder to squash that fear, leading to more fear... and it becomes a vicious spiral downwards until you reach a point where you are too afraid to do anything that is even slightly uncomfortable which is such a dull and passive way to live.  

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Instead, embrace the fear. Enjoy the feeling in your stomach as if you paid to ride a roller coaster for it. Harness the fear and twist it into excitement and joyful anxiousness. You need to love fear, to want it. You need to want it so much that you go out of your way to find situations to give you that feeling of fear- walk over to a cute girl sitting alone and start talking to her, volunteer to give a presentation, walk into your boss's office and ask for what you want. If you push yourself to seek out fear, if you crave it like the obsession of a drug addict, then you will never let fear hold you back again. You may even find that eventually things that initially gave you fear begin to feel just.. regular. You may find that you need to do bigger and bolder things for that fear, and if you conditioned yourself to want it then you will go and do those things. 
It's definitely not easy, but if you can learn to love the feeling of fear then you may never be "too afraid" again.