I once loved that film!! Looper with Bruce Willis and Joseph Gordon-Levitt. Then, I watched a film on YouTube called Everything wrong with looper. I still own the DVD of the film and it has been literal years since I have watched it, so I may break it out again.
Time-travel, future, coming back to fix past mistakes, realizing you are one of the past mistakes you must now fix. Truly, mind-boggling film!!! If you have the means, I do suggest checking it out.