My boyfriend has epilepsy and from what he's told me and from how solid and loving our relationship is, I think we'd both agree that communication is the most important thing. He has also shared with me that when past partners take on a big "care taker" role, it has never worked well for him. I support him and his lifestyle (dietary and sleep and medication needs etc) and go with him to neurologist appointments, but I respect his autonomy as well. We have both been through some heavy life stuff, so the way we see the world/life is similar. I think a partner of someone with any serious health condition has to have that level of maturity and the resilience to not let little things (or seemingly big things) derail them. I've learned that I can't let myself worry about things I can't control and to enjoy the present moment even though it can feel scary sometimes. I work to be honest with him about how I feel. He has told me that his epilepsy needs to be approached openly and acknowledged just like any other aspect of our relationship.