Head over Heels (2001) ending / spoiler
Freddie Prinze Jr. is actually an undercover FBI agent named Bob Smoot that is trying to take the Russians down. The "murder" that he commited was just a hoax to fool the russians. Monica Potter realizes that their whole relationship was a lie and just walks away. A few months later "Bob Smoot" moves back in the neighborhood and she gives him another chance.