Marissa & Alex are best friends, they both like one another but Marissa is trying to deny the way she feels and hooks up with random guys. This devastates Alex and she basically tells Marissa that she should have waited to fall in love.
Marissa missed Alex tried to make their relationship work for the second time. Marissa gets freaked out because reality finally hit her. She realizes that she really is into Alex and goes back to her.
