Do not persist and try to talk her into it. Communicate with others and let them know your expectations and intentions. Do not condone men who might be talking derogatorily about women and sex. Don't make rape jokes. Confront those who do.
Rape is a violent crime.
Help to eliminate the stereotypical attitude that women are sex objects and men have the right to take whatever they please, especially in a dating situation. If someone you care for has been raped, be supportive and understanding. If you are confused or upset, seek counseling. When approaching women on the streets keep your hands visible. Walk so women have a clear path.