One of the many infortunate consequences of the success of GitHub is that lots of developers are now convinced that development has to be a public, social activity.
You do not have to release everything you build. You do not have to accept patches. You do not have to answer to emails or to issues. You do not have to fix bugs or implement features. You do not even have to continue working on your projects.
If any aspect of your public work stresses you, remember that.