Why is an object stuck to another? So I created a Cube in Blender and then I created an Empty beside the Cube (in object mode). Now, when I move the Empty around, the Cube follows... Why?
You more than likely hit O by accident, this enables proportional editing in object mode just as it does in edit mode and can cause nearby objects to mimic the one(s) being transformed.

Just turn it off by clicking the blue icon or by pressing O again.