From my personal experience with the hospital system (I've been admitted 6 times, and am in a hospital right now), they only admitted me if I was a danger to myself or others. However, if they think the illness is serious enough, I'm sure they'd admit for that too.

Just be completely honest with your doc. He may recommend that you go into hospital. And if you don't want to, you don't have to. But really, the hospital isn't such a bad thing. They treat you well, and provide you with medication options that could end up helping a lot.