IMHO the best love games are role ones, when you play different people.
So, girls, I think that your beau would love if you become a bad girl for a night... Your role would be of a prostitute and your beau - a client. The sense of the game is that you should get into the role, only then it would be interesting. So don't be offended with your boyfriend if he would treat you in a rough way, how they like to do with real prostitutes. Behave correspondingly - be free and easy, apply bright make-up, put on short skirt and low-cut T-shirt. Your look should be bold. But with this you should submit to your "client" in every single action!
I think such game would turn you both on greatly. So, try it and get cool emotions!