You start a good cause, you enjoy it, and one good day you feel it’s not touching your heart anymore. It’s just human to feel so. And you don’t want to quit, hence the solution is to take a break or to check if you are overdoing it which is overwhelming you.
You can come back because we live in the infinite world, where there is no beginning and no end, which permits us to step in and step out when needed. Listen to your heart, and if it ask to step out, do so.