Whats the name of the movie? (Woman gets paralyzed in an accident, uses insecure guy to help her die)?

I vaguely recall a movie there a woman gets paralysed from the neck down in an accident. Caused by an geeky insecure guy (I belive). She then tried to persuade this guy to kill her by letting her wheelchair go off the platform in the train station (so it would look like an accident). He couldn't do it and bailed out in the last moment... What's the name of the movie?