Don't go darling

Loren, 18, lives in Chicago.
She dates Zack, whose 20, for 3 years. When Zack finds out he has to travel to other city, Loren's heart breaks in pieces. In the middle of the story appears Noan, a boy with 21 years, who lives really close to Loren, well... in the same street! But they've never noticed each other.
Is Zack really the love of Loren's life?