Indifferent family seems to be a thing. It comes up on /r/writing (reddit) and other places where I see writers talking. You hear stories about people who have spouses that don't read their stuff. Isn't that mind-boggling?
I think it's just a fact of life when you're a writer. I liken it to being a parent, in some ways (disclaimer: I am not a parent) - you've got this one thing that takes hold of you, it demands your attention, fills your thoughts, you agonize over it, even when it's okay (picture the parent watching their child to make sure it's still breathing - the writer stressing over whether people will like this storyline), and it generally consumes you.
With all the emotion and time you pour into it, the hopes and all of yourself, you then show it to someone close to you and... they don't really care.
I mean, sure, some people will coo over it and compliment you on all the hard work you put into teh baby/your writing, but it's a rare person that seems to really recognize all the hard work and all the rest. Some of you will know what I mean. The 'congratulations!' followed by, a week later, 'Can you maybe skip doing a chapter to help me out today?' Or, more often, family or good friends, sort of shrugging it off and not having much to say when you're talking about the writing, then asking you what else you're doing these days. And then there's a moment of dissonance, a widening gulf between you and them. They can't fathom that this thing you were just talking about is what's been taking up 95% of your free time, and that you're struggling to find half an hour a day to claw out a few moments to yourself and recoup your self-identity.
The long and short of it is fairly simple - as amazing as your baby is to you, as much as you value it, it's just one baby among hundreds of millions to the next guy. Even if, often enough, that 'next guy' is someone important in your life.
They say being a writer is a lonely venture. This is part of it. Value the people close to you who do read your stuff. Accept it as reality when someone doesn't actually get around to looking at it.