I've been a huge fan of doing what you love, but a few years into the work force taught me something harsher but more useful: do what you need to do. It's never going to be just fun and games all the time. Sometimes you have to drag yourself out of bed to get to work, or sometimes you might feel like giving up because you don't "love" it anymore. But love, while nice to have, is terribly fleeting. Necessity is what really galvanizes us into action.
So, if you feel like you're in a rut, don't stop and flail. Just do what you need to do. Do whatever will help you do what you need to do. When you realize that you don't need this direction anymore then - move on. When the compulsion is gone, walk away.
But while it's there, stay there and do what needs to be done.