Well, what do you like to do? What are your dreams? You need to take the initiative to try new and different things, and maybe even change your lifestyle. That's obviously much easier said than done, but it's worth a shot. I recently went through some self-realization similar to yours. I realized how dull my life was, how unsocial I am outside of school, and how I spend my time doing nothing but watching T.V. and playing computer, and I became sick of it. This gave me enough motivation to attempt to completely change myself. I'm still going through the change, but I've vowed to make myself more social, go out with friends more, and actually spend over half my time outside of my home. I'm hoping to be a different person at the beginning of my Junior year. A more friendly, sociable, and outgoing person, and my motivation is similar to what your situation is now.