I don't see a point in life anymore...?

As the title says, I don't see a point anymore. It seems I never smile anymore and feel like I'm an outcast, a loser. I'm 14 and it just seems when I wake up every morning, I don't see a point in trying. I have a good group of friends whom I am close with, but I have trouble holding conversations with other people, especially girls. I've never been any good at sports,or very much for that matter. I'm in an advanced class(not trying to brag) and I hold a A- to B average. I used to be a very outgoing person and within the last 6-9 months I've slowly became less outgoing to the point where I'm nearly afraid to talk to anyone but my friends. Also in those 6-9 months I've begun to have suicidal thoughts. I'm not worried as I would never be able to kill myself. I just want to know what I can do to become and even more outgoing person than what I was. And mainly, I just want to live a happy life. Any help is appreciated.