Laura Barnett 
The Versions of Us [EPUB ebook] 

In one moment, two lives will be changed forever . . . and forever . . . and forever.The one thing that»s certain is they met on a Cambridge street by chance and felt a connection that would last a lifetime. But as for what happened next . . . They fell wildly in love, or went their separate ways. They kissed, or they thought better of it. They married soon after, or were together for a few weeks before splitting up. They grew distracted and disappointed with their daily lives together, or found solace together only after hard years spent apart.