Just walk away from it, you lost nothing. If the emotions are there, learn to let go for we are born and will die alone.
Compared to what happened to a family friend, this is nothing. A chick he was seeing slapped him silly and had him arrested for allegedly "beating" her, forged his signature and changed the locks on his car to keep it, went into his house and took all his shit, and she still won't leave him alone.