I have a typical heart break love story.Help me decide.

Boy meets girl,says he loves her.Girl is not 100% sure of her feelings or his intentions. So she decides to wait and see.Time passes.They talk like friends and she is slowly falling for him.Then he says he is in love with someone else. Her heart breaks.Now she is mourning a relationship that didn't exist .He is engaged to the other person now. What should the girl do??

So should I confess my love at this point or should I keep quiet?? What would you do? Can't stop crying trying to decide.