Him

Zack Gallagher has two big secrets. He's bisexual, and has a crush on his best friend Jace, and he can see the near future, along with being able to manipulate liquids like his parents. They died when he was young, and he lives with his foster family.
The summer before Senior year was his best and worst. He finally feels happy; he's dating the boy he loves. Until one night, it all comes crashing down on him. A drunk driver crashes into his boyfriend's car, killing him on impact.
Zack becomes cold and empty. Senior year starts right after the funeral. But this year, there's a new student. A trans boy named Joshua. Zack has an immediate connection with Josh, but is afraid to find love. He doesn't want anyone else to die.