While the beer concept may help, if you are going to do it, try not to rely on it too much. You don't want to get to the point where you need the beer to become Mr. Social.
Talking to attractive women is humbling for me. I'm pretty confident on my social skills, my roommate actually just used me to advertise his bake sale for his club in college by sticking me up front and bringing in people because I know a good bit of them. But even then, I'm the same as most when talking to a beautiful girl, I suddenly just can't look into those eyes and I end up feeling undeserving haha.
What is your lifestyle sir? Your profession, what do you typically do per day, things like that? You might be putting yourself into positions that only serve to increase your "natural introvert" persona. I was quite an introvert myself, I would go home and lock myself in the basement (my room is there), barely speak to my family, eat dinner downstairs, work, sleep, wake up and go to school, then afterschool, come home at 10:00PMish and same thing over again. But it turns out I can be quite social, I just restricted myself because of the way I lived and viewed the world back then in high school.
The books suggested above, if you so desire, knock yourself out. But advice books don't mean anything unless you put them into practice.
