So when I was like 7 or 8 I remember watching a horror movie with my babysitter and it gave me nightmares, I want to watch it, but I have no clue what it's called.
I only remember certain parts of it.

THIS IS WHAT IT'S ABOUT: So this couple takes their dog for a walk on a secluded beach and the dog like drowns or goes missing. Anyway, the couple then start fighting and then the boyfriend/husband locks her girlfriend/wife out of the car and then she walks off and then the guy gets worried and tries to look for her. He finds her like dead with something through her head or something I can't quite remember. And then he starts freaking out. Something happened on this part but I can't remember what. Anyway, let's skip to the end the guy is all sad and stuff and then for some reason he steps out in front of a truck and it hits him.

I HAVE NO CLUE WHAT IT'S CALLED. I THINK IT CAME OUT IN 2012 OR 2013.
Please help! Freaking out!