In his great literary guide and memoir On Writing—read it now, if you haven’t already—Stephen King unpacked many secrets of the scrivening trade. Among the more salient was this:
Writing is a lonely job. Having someone who believes in you makes a lot of difference.
Finding a writers’ group helps. So does suborning your friends and family to read what you’re working on. Feedback is never a waste, even if you end up ignoring it completely.