I've often thought of this over the years. There are always the patients that were with you for months at a time and you feel close to the families. I feel like you really shouldn't "friend" patients while they are still in-house. Wait until they've been discharged. Also, if you friended every "special" family, you'd end up with tons of people you look back and think, "who were they again?" Over the years, there will be many families special to you, but maybe not enough to keep the hundreds as friends on social media.