You can never move on when all you think is the waste.

Everybody wastes something, and by holding a grunge or blaming it on the people you've wasted on is just unfair, since they've wasted some things and they didn't blame you afterwards or cry over the waste.
You want all your money back, why not go and ask them, you want your energy back, why not go and ask them to do something for you in return? All you gotta do is ask.

And if your motivation to stay with someone is just because you don't wanna waste something, man, you have a lot to learn.

Cheers! Hope you get a rebound quick