I felt the same way before. I've been inactive on and on for months, and whenever I get back I have this energy to just go and write, spread what gift you have and let anyone have the chance to read your works. However whenever I see little changes of what I am passionate about, it is kinda disappointing and tiring to continue on.
Now I found my light again, trying to discipline myself and giving that worth that my works deserve so others can see it too.