The “spark” is gone.

Has anyone else had the “spark” in their relationship disappear? If so, what caused it? Mine got to the point where we were always fighting all the time, I started to find the things that he did were more m annoying now than cute, and sex became more like a chore than enjoyable. It was just like a switch flipped and it was all gone. I started recently reading “The 5 love languages” and it’s helped a bit, but I’m just wondering if anyone else has had that happen.