Although I do encourage you to maximize your self-image, I do not encourage you to be somebody you do not want to be, especially just for the purposes of attraction.
If you don't drink, don't pretend you like going to bars.
If you are small short guy, don't pretend you are big and tough.
If you are a mathematician, don't pretend you are a rock star
By pretending, you can never compete against those who actually do like it. You will lose every time and she will choose the best one of her type.
Do what you like, be proud of it and you will attract more than pretending to be somebody else.