Didn't want to abandon this thread - so here's an update.
We're back together!

And yes, Rodney - you described our situation perfectly.
We both kind of realized this, and took "great effort" to put something into the relationship, and its taken a turn for the best. I suppose love IS a verb after all. You have to put something into it, to get something out of it. All I know is that I'm happy when I'm with her.
Maybe not in the same way as with the person I had the 'fling' with - but happy nonetheless...