@Miss_K I wish I know the exact right words to say. . .
First of all, your art is awesome. I mean seriously, it's awesome. Don't you doubt that for a second.
Secondly, I am on another forum for Christian writers, and I was going through this exact same thing for my writing, so I asked other writers for advice, and they replied with some of the most encouraging words I have ever read. Even through this is about drawing and not writing, you should read them:
There. Just a fraction of all the amazing feedback I got when I was struggling. Let me know if you want more. I'll be praying for you, dear friend!!