What Strange Things?

This is about this 17 year old, Davin. Davin is a emo, sort of a loner and since the incident has started smoking weed. At age 15, he undergoes a incident involving two cars, aswell as watching his two friends and girlfriend, Vanessa die. He is wrapped up in love. Yet, he doesn't know that his girlfriend, is only a figment of his imagination. He has mental problems, but doesn't know it. Sofia, his mum forces him to go to a Doctor about it. Does it help? You have to see for yourself.
Or is it someone else that helps him out of the trauma of having a dead girlfriend, friends still in your mind.