If you have idea for the next chapter or you want to write it, then you should totally update! <3 You might (MIGHT) have lost a few readers due to not posting in a while, but you'll definitely have a lot of people who will be happy that you updated. If you don't have any ideas for any chapters (like something in the middle, or the end) after the next one, then you could post the next chapter (if you have something in mind for it) and then in the story's title add *ON HOLD*, explaining why in an A/N.
Whatever you decide to do, let it be the choice that YOU'RE the most comfortable with! <3