This reminds me of a dream I had as a kid. It had a BIG spider who acted like a dog. A very friendly and playful dog. That dream actually made me less afraid of spiders so I really appreciated it. Your artwork really reminds me of it. Great idea and I love how you portray both the girl and the spider. Very cute.
That's the thing. Spiders are only scary when their tiny, the bigger they are the cuter and fluffier they get. It's actually very rare for a large species of spider to not be cute, just look at tarantulas!