A Superlover is someone I've met at least five times in the last two years and whose last date was less than six months ago. It's a privileged lover with whom I have an affinity, who knows me well and whom I know well. A friend, a confidant, an accomplice.
Superlovers benefit from a host of advantages : they receive a gift on their birthday, they are invited to private events, they benefit from advantageous fares, and so on.