There's nothing in my life?????????????????????????

I'm fifteen, and I feel like my life really isn't composed of everything. I'm in 9th grade, make decent grades, but everything else is empty. I like sports, but thanks to sucky genes I can't play them. I also like writing, but I can never pull myself to write anything more than a page or two. I play video games most of the time because that's all I really CAN do. I may hang out with my 1 best friend once every two weekends, but that's all. I talk to him about an hour in school. I really can only play video games without getting flat out bored of it after a couple of hours. But I always have a voice in my head when I play telling me that someone as smart as me shouldn't sit around playing games all day and should do something productive. But I don't know what I can do. I would like to get a girlfriend, but I'm not the best looking guy and I don't have any natural instincts to tell me if she's into me or not. And I have low self esteem in that particular area. So when I try to get a girl I end up backing out, and I fear being rejected. I'm also kinda shy. Due to my shyness, I only have about five REAL friends. I also have a HORRIBLE feeling like I'm just repeating my day just goes in the same circle each day that pes, if that makes sense. Does anybody have anything productive to tell me to help me in ANY of the things I discussed?