You need to realize something else: that you can lead a perfectly good and satisfactory life even if you’re not a writer. When I figured out that I could be perfectly happy and not be a writer, I became a better writer.
I don’t think you ought to let your happiness depend on writing. There are a lot of worthwhile things you can do. The unhappiest people in the world may be the ones who think their happiness depends on artistic success of some kind.
I’m working on my book again, and this quote echoes where I’m at in my thinking. I want to live my life, really live it, and out of that richness will come a river of words. That’s what I believe.