More Than Friends by Linda Verji

Being in the friend-zone sucks!
No one knows that better than Amarie Parker. She’s had a crush on her sexy-as-sin best-friend, Kit Iseman, since forever. But he is blind to her feelings… or pretends to be blind. Still, she stays his friend. Watching him date women who are too idiotic to realize how special he is. Desperately hoping that one day he will see her as more than just his sidekick.
However, the return of an old flame makes it clear that living as just his best-friend forever will break her. Now she has to make a hard choice… fight for him or cut him off completely.