I've never really had a problem with it. I'm of the thought that there's someone out there who's perfect for you. The only drawback is that you have to be perfect for them. The best way to increase your chances is to get to know as many as you can.. if they're right for you, you'll 'click'.
Easiest way? Hang out with a few girls. Someone is bound to be attracted to you for absolutely no reason.
Attractiveness helps, though. It doesn't get you a girlfriend, but it does get them to notice you. You could try and comb your hair, work out, or just get a reputation for being smart/rich. Believe it or not, a lot of girls swoon over smart guys. Confidence is the most effective way, though. With a sincere smile, even the ugliest guy can attract almost any girl.
"Making the move" is usually the hardest part. It takes a bit of courage to just say 'hi' to some random girl in the bus sometimes. Despite sexual equality and all, it's often expected for men to ask the girl out. But as a male, you're lucky... research shows that it's women who first show interest, and the men act upon the interest. Just have to learn to spot the minor signs of interest - watch a friend with his girlfriend, and you'll see little body language patterns. Better yet, find a girl who has a crush on someone else, and see how she acts near her crush.
At your age, there's a lot of people eager to get a girl/boyfriend, so it shouldn't be too hard to find someone.