Also, in my experience with girlfriends, try to never hunt for a girl. Sit back, a girl will show interest in you eventually.
The girls that you have to pursue always end up being the ones that cheat on you, or forget around.
Also, you're just 15. I wouldn't be worrying too much.
AHAHAHA THAT IS THE MOST BETA THING IVE EVER HEARD
Okay one thing you should know; girls don't like to go after the guy who sits back. Why? Because that guy doesn't seem interesting. He's the guy who lays back and lets things just "work out" rather than being out there. The guy who actually goes for it (and isn't a completely spaghetti friend) will get laid 9/10 times more than lay back guy.
How do I know? Because when I was 14-15 I did just that. I sat back. All of the wantable chicks pass over you and you have to settle with beta-hunters. Recently I have observed that being straight forward, but not creepy, is the best way to go about things. Girls loving respond when you go out there and do stuff. If it doesn't work, don't keep trying. There's like a million chicks that you can play the moves on, don't hone in on that one.
disclaimer; no chick is ungettable. sometimes things just take time. subtlety works magic.