Honestly, that "happy" feeling you're referring to didn't happen for me until I did get back to where I was.
But it did come back!
What worked for me was switching my focus from weight to fitness as much as I could! It's a hard mental shift to make, but it's awesome if you can do it. I started focusing on fitness goals. I wanted to be able to run a 5K and I focused a lot of energy on that and celebrated each day I ran whatever goal I set for myself. I signed up for a spin class and set little goals for myself about getting through the class or putting on more resistance than I had before. I focused on a number of sit ups, a number of push ups, a weight increase when lifting, a rep increase, etc. I focused on how wonderful it felt to be able to go sledding with the kids and run up the hill more times than they did!
I also took numbers I hadn't paid attention to in previous attempts. I measured my waist, recorded my blood pressure, recorded my resting heart rate. I watched my heart rate on machines and thrilled every time it peaked in a lower decade despite equal perceived exertion.
Those kinds of things really helped to get my mind back where it needed to be. And I think it has helped make this a long term thing for me. It's good to get your mind off the scale.