[ Singles & Dating ] Open Question : What's wrong with me?

I'm in highschool. And I don't really get asked out on many dates, and if I do, I don't really see them like that, so I turn them down. Most of the time it's one of my best guy friends, so it would be awkward since I see them as a brother. So why don't the boys ever really talk to me often?(Cute ones, but not just scool, anywhere) Everyone talks to my two best friends.. they aren't virgins though. What's wrong with me?? I wear a size 5/6 in jeans and I have recently lost alot of weight, and it still hasn't changed. I'm not exactly breathtaking, but I do look presentable. Thanks!