Hi MightyMung... I met my husband when I was drunk and if it hadn't have been for the alcohol then nothing would have happened - that's a fact. For the next couple of years after that I continued to be drunk most times I was with him - drunk or hungover, anyway. Eventually he started getting concerned about my drinking and he hated it, really hated it. He now tells me that if I hadn't have stopped drinking, there would have been a day when he couldn't take it any longer... he would have had to have left me for his sanity.
The only good thing to ever come out of my drinking was that I met him. But I would have lost him because of it, too, if I hadn't have stopped.
If you feel as though drinking is a good idea because it will give you courage, etc, think of it like this: you won't be able to carry on doing that forever. She won't put up with it forever.
Hope it goes well... have confidence in yourself. She obviously really likes you, remember that!