Trying to keep myself from quitting writing...

You make some very good literature, if your recent spooky story is any indication. However... you need to watch out for your own needs. You need to continue with school or work or whatever obligations you have. You need to keep your grades up or pay rent. You need to support your healthy relationships. Your fans will get by, and if they truly care about you, they'll understand. If something has to give, I recommend some of the intensity of dedication.

If you do want to keep up motivation because your life circumstance and stress levels support it, I recommend you mix up what you're doing. It can be kind of a slog keeping the same exact project going, while dropping it for something totally different is a new stress of its own. Maybe consider wrapping up the current story and starting with a sequel? Same enough you can keep momentum, but different enough you're not wearing down the same tires.

 

For me personally if I'm trying to write something and I just lack the motivation for the particular story, I put it on hold for a bit and write something else. That way I'm still getting writing done, but I'm not as stressed about it.
If writing is something that you really want to do, then I think you should continue doing it. If you have to write less often, or make your chapters or stories shorter for a bit, then do it. But don't give up writing for good.