Chlorine Sky by Mahogany Browne

Sky is used to standing in the shadow of her best friend. Lay Li is the sun everyone orbits around. But since high school started, Lay Li has begun attracting the attention of boys, and Sky is left out in the cold. The only place Sky can find her footing is on the basketball court. With each dribble of the ball, Sky begins to find her own rhythm. Lay Li may always be the sun, but that doesn’t mean Sky can’t shine on her own.
 
With gritty and heartbreaking honesty, a critically acclaimed poet, delivers her first novel in verse about broken promises, fast rumors, and learning to generate your own light.