Always Watching

Lizzie meets Cormac McLaggen after striking up a conversation with him. But she soon realizes that he wants her to be more than a girlfriend to him. Repulsed, she rejects his desires and demands that he stay away from her. He soon begins stalking her and nothing and no one can stop him. Why is he doing this? and what does he want? Based on the TV movie and book 'Secret Smile'