To be honest, I really liked your story. I feel like it has the potential to be really awesome. Most of the Slender fics I've read either gloss over how he feels about being the way he is, or poorly explain things without going into much detail. I like how you have him a sort of internal monologue where his biggest enemy is himself. I also like how the human who found him was a friend rather than a love interest. I like a Slender romance as much as the next gal, but sometimes it just works better as a friendship more than anything. I can see the story going basically anywhere, but no matter where it goes, I'll be reading.