The Vicious Kind (2009) on Netflix

Plot summary

Caleb Sinclaire picks up his younger brother Peter at college and drives him home for the Thanksgiving holiday, along with Peter's new girlfriend, Emma Gainsborough. Caleb, whose long relationship with his girlfriend has just ended, is wary of getting involved with anyone. He warns Peter that Emma is going to break his heart, and he is antagonistic toward her from the moment they meet. Peter says Emma is a good girl; Peter and Emma met while she was dating another fraternity boy. The brothers' father, Donald Sinclaire, wants to connect with his sons, but Caleb tells Emma that he does not get along with his father. Caleb has trouble sleeping and keeps seeing his ex-girlfriend, Hannah, in his mind. Despite his warning, Caleb is drawn to Emma, and he runs into her again over the next two days.