Reason why most of mpgh is still virgin and don't have a girlfriend, can be found in this thread.
Be lovely to her and expect more than just sex from her.
Go the old school way and get some shit done and ready for her.
- A good dinner done BY YOU, and with a nice environment around, is usually a good idea (rose petals with a nice scent/smell plus some candles, there is a reason why this is done so often, they usually like it).
- Prepare a nice warm bath (~10 candles work well here), join her, be romantic. Rose petals/shower gel so you can't really see whats underwater (before the dinner).
- A good/hot body massage aswell.