When I need inspiration to ride again I imagine this guy yelling at me, saying "YOU HAD BEST GET BACK ON THAT BIKE AND RIDE!"
(He has a lot more profanity when I imagine him...but I don't know you or your tolerance for that sort of thing)
As for getting a new bike...that's your real motivation. Spend a lot of money on a new bike and you'll be motivated to ride it just so you didn't waste money! After a couple weeks it won't feel like work anymore and you'll be glad you forced yourself to buy the bike and ride it.