drag (oneself) up by (one's) (own) bootstraps

drag (oneself) up by (one's) (own) bootstraps

To put forth effort to improve one's life or circumstances, rather than relying on others. After I declared bankruptcy, I had to drag myself up by my bootstraps and rebuild my financial standing. I know you're heartbroken by this breakup, but you just have to drag yourself up by your own bootstraps and get back out there into the dating scene.
See also: bootstrap, drag, up