Unfortunately, not everyone is going to fully understand depression and how much of an effect it has on those with it. Just because someone doesn't fully understand the illness, doesn't mean that they don't care. If your family cannot understand fully the pain you feel, you could reach out and tell them that although they cannot fully understand your illness, does not mean that it doesn't exist. Tie telling them that they don't need to understand the illness, but they need to accept the fact that it has such a big impact on you. They will try to be more mindful of you if they know how much their lack of understanding impacts you.