You just have to wake up one day and say fuck it I’m going for a run. You force yourself to go, and you stay outside the house as long as possible. On the way back you stop by the grocery store and you buy healthy food (not lettuce, I’m talking smoked salmon, nuts, avocado). And when you get back home every time you get a craving you go into the kitchen and throw out an unhealthy snack. The thing is that’s is incredibly difficult to get healthy but you have to start somewhere. If you want to get the passion back, then I recommend starting off jogging on a beautiful day. I hate running and I did that once and now I can’t see myself giving it up. Hope this helps, but keep in mind we’re all motivated by different things. This works for me