What pushes you on?

Hi.
I recently just fell of a 120+ day streak, with my second largest being 14. Anyway, I'm trying to get back on track, and just can't. People say after a long streak relapse often say that the urges aren't too bad, but it's HARDER for me now than ever.
I need some advice.
My drive used to be just trying to beat PMO by the end of the year, which seemed to be enough; now, I've got nothing besides that sadly fleeting feeling of disgust. What drives you on? For any teens like myself reading this especially, what reason pushes you on?
Thanks for any advice whatsoever!