I had a friend like you in high school. Always looking for girls but never getting them. The girls knew that was all he was after, so they didn't like him. This guy had no social skills, but he had confidence. The reason that he had confidence is that he practiced alot. He would constantly talk to girls. Sometimes they wouldn't even respond, because he was pretty sleazy. But he kept trying, and failing.
He started succeeding after going to the gym, getting a job, wearing nice clothes and basically growing up, getting life experience. THEN he used the confidence he already had to get alot of phone numbers.
So if you really want to get a girlfriend, just practice talking to random girls in the street, and see if you can get their phone numbers, even if you have no intention of calling them. Then when you find a good christian girl or she finds you, you will know what you are doing as you will have done it before many times.