You shouldn't give up! Art takes time. A lot... lot... lot of time. Took me six years to know this much about anatomy, and it honestly isn't much.
I personally like to take a break-- just wait until you've nothing to do all over again, and you'll be wanting to finish this bad boy (er, girl. >D) in no time.
It's not perfectness. xDD In fact, I can find some mistakes I've made right now. I also agree with Jonathan-- even if an edit isn't your style, at least try to understand where they're coming from.
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