Broke off with my boyfriend -> Started hitting the gym every day of the week and eating healthy -> From 209 lbs to 160 lbs -> Got back with my boyfriend -> Stopped going to the gym, started eating junk food -> Going back to 209 lbs slowly.
I know it sounds super shallow but my motivation when I was single was getting laid. :/ Sucks but it's true.
Maybe we should get our partners involved with our training/diet. I hear that helps.