Basically, the story is about Tom (Patrick Dempsey) and Hannah (Michelle Monaghan). For Tom, life is good: his sexy, successful, has great luck with the ladies, and knows he can always rely on Hannah, his delightful best friend and the one constant in his life. It's the perfect setup until Hannah goes overseas to Scotland on a six-week business trip and Tom is stunned to realize how empty his life is without her. He resolves that when she gets back, hell ask Hannah to marry him but is floored when he learns that she has become engaged to a handsome and wealthy Scotsman and plans to move overseas. When Hannah asks Tom to be her maid of honor, he reluctantly agrees to fill the role but only so he can attempt to woo Hannah and stop the wedding before its too late.
In the movie, Tom and Hannah just best friends since 10 years ago. They love each others without notice by themselves until they have to separate for few weeks. Sometimes the best one already exists beside us but we never realize it before something happen. We never seriously look around us because most of the time we only look for others so called the most suitable girl friend/boy friend or even husband/wife.
For me, maybe i am the one of those people i mention early... Sometimes, i really don't know what i should and what i shouldn't. By the way, the movie is great! really a great movie~