Worst-case scenario you can just keep the purse. There has to be something valuable in there. Throw yourself in front of her car. Okay, not too terribly original and slightly dangerous, but this one is a goldmine when all else fails. Overcome with feelings of guilt and all sorts of sensitive female-type emotions, she will fall in love with you.
Poetry drives women wild.
If you are a quick witted individual, you can try spouting off some poetry on the fly. Poetry is a sign that you are creative, intelligent, and sensitive. If you have to, just pass off anything as poetry, the more vague or difficult to understand it is, the greater the likelihood that she will think it's a hell of a lot more meaningful than it actually is. That is all I shall share with you for now. Perhaps later, I will update this guide.