Die Liebe ein Traum (2008)

Anna and Max meet in the university library. It's love at first sight, but the two are like dog and cat: she wants to be free, he seeks the bondage. She loves chaos, he loves order. When her best friends Tillmann and Clarissa marry and have children, they go their separate ways. But over the years, they meet again and again--each time painfully realizing that they still love each other. Finally he receives the invitation to her wedding to smart businessman Charles.