The Obsession(2017)

Mandy thinks she has found the perfect roommate in her coworker, Michele. But when an innocent comment is misinterpreted by Michele, things quickly escalate from platonic roommates to full-on infatuation. Afraid that she might be overreacting, Mandy digs a little into Michele's past and quickly discovers that things are darker and more sinister than she ever imagined and that it might be too late and too dangerous to end their arrangement.