Lingering Looks

A woman can show a man that she is into him by giving him lingering looks. She may also hold a man’s gaze briefly, turning her body toward him. A slow turn of the head may be perceived by a man as an invitation to come closer. She may glance over and make eye contact while raising an eyebrow (this is a more obvious sign of flirting).

Women always give themselves away with this one special tip you are about to get here:
The higher a woman's interest in you, the more likely she is to watch you as you leave. So, next time you leave a woman, as she's standing on the curb, pay attention to whether she watches you drive off, or if she just walks into the house. If you're getting out of her car, pay attention to whether she drives off, or watches you go into your house/car.

When a woman feels a genuine attraction toward you, her feelings linger when you're long gone.