No one knows your story like you do. You raise it like a baby. You nurture it and care for it and prepare it for life. When it goes out to face the world, you fear if it is going to fall and get hurt.
You toil alone, for the most part. You fight your battles alone, you face your demons alone, and, win or lose, you endure alone. Friends can only stand to one side and say, 'I hear you.' They can inspire you, encourage you, motivate you but they cannot share your frustration. When you want to bang your head against the wall, you don't want them to bang it for you.
You try to see through the eyes of your characters all the time that sometimes you forget to see through your own. And you most definitely fail to see through the eyes of the real people around you.
Real problems are not problems any more unless they serve the purpose of appearing in your writing.
You force others to find their solutions, and inadvertently look for yours within your own world.
You sometimes feel the pain of your characters more than your own.
You abandon things and desert people, and feel guilty for doing so. And it's no fun feeling guilty.
Writing isn't all about writing. It isn't only about writing. It's a whole lot of things apart from it. And not all good.
But, when you take up your tools and begin to create, it makes everything worthwhile.