it seems to me, most women act "normal" when they do honestly like a dude and they're trying to show it. by "normal" i mean they aren't being extra flirty or trying to hog your attention in an attempt to get you to like them. the second mentioned women might like you too but they're more likely to spread their "love" around in an attempt to reel someone in or sometimes they just don't really like anyone, they're just being girls.
to be honest, when a girl acts normal, i don't ever pick up that she likes me until she becomes direct. however, when they do act normal, i'm more likely to express interest (at the conversational level) and talk with them, even meet with them another time. the second they shift into girly mode, i don't take them seriously because i feel like it's a game of cat and mouse and i don't like chase people to find out how they feel about me or to chase them in general. there's way too many other things to worry about than whether i can "capture" a girl. i'm worried about paying my bills and making music, when's the next gig and my family, not whether or not some random girl is interested in me because she bats her eyes at me but walks off...