It's their party... Meet Melissa and Paul: Five years after they split up he's still looking for love in all the wrong places while she wants the one thing she can't have: Paul. Meet Chris and Vicky: They're so in tune they even brush their teeth in time with each other. So what is Chris doing risking it all for a meaningless affair? Meet Cooper and Laura: He wants to settle down, she wants to take a grown-up gap year – but can their relationship really survive a year apart?