We never really saw it happening : everything is not as it seems

Everything is not as it seems... Tansy finally wakes up from her trauma to find out that the friend she had known for the past year was nothing but a figment of her imagination. "Have you ever heard of the coping mechanism called Fantasy survival?" Her therapist asked. She is led to believe it's a coping mechanism called Fantasy survival, but what if she finds something relate to her friend? Is Blaise Ayers real or a figment of Tansy's imagination?