career problem

I have been writing for a long time now but whenever I write I feel I am not creative enough to be practicing it. I am afraid of doing things or showing my work to the world and I cannot stop writing at the same time. I am so confused and sad that I cannot even talk about this to anyone because I have always shown off my writing and kind of had an attitude because I could write. Please suggest me the ways I can overcome my fear or what should I do to make myself believe that I can also become a good writer like Sidney or JK Rowling.

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