Little Do You Know by Laurea Matthews

Thalia Lewis has just returned from a year abroad only to find that the apartment she is moving into with her brother also houses his best friend, Sebastian Walker. Thalia tried everything to forget him after a few stolen kisses the night before she left with little success.

Sebastian Walker is everything anyone could want. He is gorgeous, rich, and the starting quarterback for Duke University’s football team. But this is his worst nightmare, having the one person who always gets under his skin living just across the hall.
After knowing each other their whole lives and ending up closer than anyone could have imagined, their friendship might be irreparable after the past year of no contact. Now Thalia is back, and living together makes avoidance impossible. Their interactions are cycles of constant fighting and the occasional kissing. Little do they know, there is a thin line between love and hate.