I'm looking for a foreign movie about a woman with split personality..?

Question

in the movie she and a "friend" go to vist the "friend's" family and the family is brutally murdered. The woman and the friend are chased by the killer who in the end ends up being the woman. Does anyone remember the name of this movie? It came out a few years ago probably around 2004-2005.

Answer 1

High Tension.  Good movie!!

Answer 2

Haute Tension (2003)

aka High Tension

IMDb synopsis:

French college students Marie and Alex head to Alex's secluded farmhouse in hopes of studying for their exams without distractions. While settling in, a man breaks into the home and brutally murders Alex's family while Marie tries to hide herself from the killer. When the killer binds and kidnaps Alex, Marie follows him, attempting saving her friend and, along the way, running into some dangerous obstacles.

IMDb review:

"Haute Tension" is one of the best horror films I have seen in years. It is appropriately gruesome and shocking and does not take the wisecracking, action movie-based horror movie approach that so many recent horror films have taken. The film is well-made and paced and builds up the suspense to a crescendo and does not overstay its welcome. One would have found it unusual for French cinema to be the one to revitalize the horror genre. ... The story follows two college co-eds visiting the homestead of one of the girl's family on a school break. A mysterious man in a mechanic jumpsuit and old truck (reminiscient of the one in "Jeepers Creepers")comes to the house in the night and brutally murders the family, kidnaps the girl and overlooks her friend who has to pursue the killer to rescue her friend.