get drunk together

If youre of age, of course, and the both of you dont mind a drink then just have a drinking game. This doesn't imply that you both get absolutely plastered off your head but alcohol DOES BRING PEOPLE CLOSER. Plus its the perfect reason for you to 'Take care of her' and 'drive her home' and 'walk her to her house'. WHo knows? MAybe even walk her inside... Just take things slow ;).