I highly recommend getting someone else in your life involved in biking. Both to give you some companionship and some peer pressure to ride.

Until you have a certain level of fitness/comfort on a bike, it might not be all that intrinsicly fun to be out there. And if so, you might find your interest lagging. A couple of things you can do to maintain that interest for now:

-Reward yourself for riding. Ride to the diner the next town over to get lunch. Or a beer.
-Ride with someone. If you are not a serious and fast rider, why not just embrace it and tool around with a friend and chat the whole time? Plus, the whole peer pressure thing.
-Use your bike to run errands. Usefulness is as good a motivator as fun.
-buy a bike and then hope you will be too ashamed to not ride it. (Okay, this one never works.)

jim