Like people have said, perhaps it's time to take a break. Do something completely different.

If not, go into a different fandom. Or work on a different project. As much as I love writing my stories, sometimes I have to take a step back (like, for two years...) before I can feel up to writing anything again. Or else you might need to change your pace/writing style, like only writing by yourself for 4 hours or something.

*hugs*