In my experience, it can be hard. For some people, it's easy to emotionally accept that you have to be gone at work all day but very hard to process the fact that you're right there and can't always instantly turn off and interact with them. Your family/SO needs to feel like you care about them, and you need to be able to settle comfortably into work without feeling like you're going to be interrupted constantly. It's a really knotty problem.