Just Friends? No, It Must Be More

Alison and Ryan have been friends for years. They never thought of each in a romantic way at all until Alison introduced her boyfriend Christopher. Christopher is Alison's first boyfriend. Alison is the type of girl that only enters a relationship when she knows that there could possibly be a future with that other person, where as Ryan is quite the opposite. He goes out with girl after girl without a second thought. But when he sees Alison with Christopher he starts to get... jealous?