I lose confidence too easily

My parents are gone, so I can work. But it seems I have another issue now. I turn in my English paper, and all the comments I see on it after getting it back pretty much read: THIS SUCKS. I know I should go up to my teacher and ask for help, but the fear of going up to someone usually ends up in my crying in front of them instead of asking for help, so I can't articulate my words and ask questions correctly. I'm scared. I'm too scared to even write my essay. I know I'm going to do badly again.

It's part of a long term project, and since this is a rough draft, I'll get credit just for doing it, but I'm afraid of feedback. I understand how to improve my acting, drawing, and singing, but no matter how much critique my writing gets, I can't seem to get it right. I'll have to turn in the final drafts eventually, but as much as I understand what she wants me to do, I can't get it down on the paper. I wish I had more time to develop my own writing style and play around a bit, but all my practice has to be graded, graded, graded. Grades are the silliest form of measurement to ever exist on Earth.

I hate how everyone else in my class gets it except me. I think I'm the worst writer in my period, and it makes me feel worse being in that class. I'm so sure I'll do badly that I have no motivation for this. I need to get it in though.