Facebook face time - a definite quantity of time spent communicating with a specific individual or the general universe of Facebook users. Does not connote any level of quality or sincerity, and excessive FBFT can result in perceived obsessive-compulsive FB disorder. The communications are usually in the open (wall posts, tags and comments on pictures or video, etc.), but can also be private chats and one-on-one Facebook messages.
Nah, I don't really care about her, although it may seem that we are good friends because of all the FBFT that we have. Other than the FBFT, we don't really talk much - definitely not a bff!