Yes,i feel your pain. I am a 13 years old and am not to new to writing but new to writing a book. I started the idea for my book when i was in the fifth grade and i have built on to my idea since then. I am now in the 8th grade and am hoping to finish my manu_script_ by the beginning of my 9th grade year. I too have a great passion for writing. Ever since my kindergarden days i have taken composition notebooks and filled them up with stories and pictures. I know how you feel. Just keep on writing and dont look back. Have confidence.
You will be fine.

P.S. If you would like to e-mail me my email is This e-mail address is being protected from spam bots, you need JavaScript enabled to view it