Try to interpret her body language.

Many men do not think that it is necessary to read the body language of the women that they are interested in. By reading her body language you will have some idea about whether she is interested in you or not.

The body doesn't lie. It'll tell you exactly what she thinks, regardless of what she is saying. When the two are in conflict, body language wins.

Oh, and by the way... every woman starts studying your body language the second you two meet.