If she's into you, she'll find a way to make it known.
I'm the shy type. But after I met B, my sweetie today. I took some initiative, found out her name, stalked her on facebook until we exchanged emails. Took her to dinner and plied her with beer until she agreed to take me home

(OK, maybe I didn't have to push her to hard to take me home -- I'm cute dammit.) But you get the picture? Even us shy ones, if we see what we want, we'll find a way to make sure you know it.