What do you care about? Find out what it is and then build your life around that. The only thing I'm passionate about is music, so my sober life is built around creating the best music I can make. Maybe you are really passionate about your career, so build your life around that. It doesn't sound like you have a family, but if you did that might be something to live for.
Other than that, as far as a social life goes I'm not sure what to tell you. Still trying to figure that one out myself. I'm trying to connect with people at my church and that's been somewhat successful. I'm also a member of Toastmasters -- which has helped me develop my social skills as well as connected me with other people in a non-alcohol focused environment. I've heard meetup.com is a cool place to connect with people that have similar interests. If you like to read you could start a book club -- put up flyers at a coffee shop to find other people to join. Just some ideas.
Good luck