You were forced to date this guy, called Matt, for your own sake, why?

Long years before, you were on a walk with your brother, who was about 6 that time, to bring him home from school..well until you entered a dark alleyway, where you met him, he took your brother, then there you saw your brother, shot to death.

You managed to run away from there, trying to tell someone but they never believed you..you received messages from..Matt..he threatens you to be his girlfriend, or else..