How to change your relationship status on Facebook without everyone knowing

I get that this is a very twenty-first century only-for-people-who-are-online-a-lot problem, and a silly one at that. Why, at the end of a long-term relationship that really meant something, would your mind wander to your Facebook relationship status? I can't tell you, I just know that for many people it does, and the creepy-crawly, upside-down-stomach feeling that goes along with those thoughts isn't the best thing ever. So here's how to hide your relationship status, updates and all.