When your like me and all you ever think about is pool, you'll tend to keep on playing.
In fact, i can't remember a time when i didn't want to play pool. If i can go and i have the money, i would go in a heartbeat. In fact, i even have a hard time trying to find others to go shoot with me. I just end up shooting pool by myself for a few hours.
Try thinking of pool as your main form of entertainment. When you have nothing to do, go play pool! Eventually, it'll just become a part of who you are. Of course, if you have no social life (like me), then sticking to pool is just that much easier.