I don't know who gave you that advice. If you don't have the confidence, faking it isn't going to work, and it certainly won't help you get more confidence. Think of how you learn a new language. You could take 5 years of French classes, but what do you learn? My mother can't speak a word of French, and she took 5 years of it. My friend can speak it very well, but he lived in France. This one guy in a store told me he learned more Spanish in 6 months visiting (I forget where, Colombia maybe?) than he did in 4 years of classes. I can't speak Spanish very well, and I took 5 years of it. Languages don't have to be country based, it can be the language of confidence, the language of tennis (something I'm learning now) or the language of playing video games. You learn because you want to, and because you aren't afraid of whatever it is. So if you want to learn about women, and you aren't afraid of them, you will learn. The best way to overcome your fear is to just go out there and talk. You know how if a girl came up to you and asked you a question, you would respond? They are just as afraid as you are, Aspergers or no Aspergers.
I used to be a horrible dancer, but now I'm pretty good. The first time I went to a rave, I was absolutely horrible. It took all my strength just to make an ass of myself on the dance floor. But after 3 or 4 times of going and embarrassing myself, I was somehow able to relax and have fun, and once that door was opened, I started getting better. Same with women. Once you figure out how to talk to one, you can talk to anyone. You will fail a lot, but you are supposed to. She isn't the only girl in the world, no matter what Rihanna? says...and whoever "she" may be.