After Emily wrote a "goodbye" note to her family. She died by drinking Jake's favorite perfume.
As when Emily's parents came back they were so shocked and sad as their only child, has committed suicide because of her ex-boyfriend.
As when they have told Jake about what happened on her 20th Birthday, he couldn't believe what happened.
He went to the funeral of Emily, and quickly remembered Heily. He bursted into tears and felt ashamed of his actions. He asked for forgiveness and ran away to reflect and forgive his actions.