Lisa, how old are you? I haven't called someone a nut for like 20 plus years?
He's not your bunny, you are his.. He has his cake and he's eating it, he lets her see your facebook deliberately, so that, she get jealous and stay with him..
Use it to your advantage, rant and rave about the flowers he bought you (not), dinner last night (not) and watch her leave. Maybe.