You're too shy to make a bold move. You'd rather analyze, critique, and nitpick, but never actually, well, do.
Now, take note of their style. Do they wear socks with sandals? Do they still use a flip phone?
Adopt their style as your own, but with a twist. If they wear skinny jeans, wear skinny jeans with neon stripes. If they like indie rock, like indie folk with a hint of polka.
If they make fun of your outfit, just shrug and say 'I'm trying to challenge traditional fashion norms'. If they mock your art collection, say 'I'm a patron of the avant-garde'
And that's it. With these three steps, you'll be well on your way to seducing even the most style-conscious of individuals. Now, if you'll excuse me, I have a fashion emergency to attend to... 3-Style Seduction for Introverts