I don't care about Facebook relationship status or making it "Facebook official". I think that is very childish.
Best? Never. If you feel the need to make your relationship facebook official, there is something disturbingly superficial about your relationship. Despite what your girlfriends are telling you, most of your so called friends don't want to be slammed in face with the fact that you're in the relationship and they are not. Try to think about the benefits of changing your relationship status on facebook. If you're just trying to brag to you facebook "friends" about it, please don't.