Dak Prescott just revealed his older brother took his own life this past spring ... and the Dallas Cowboys QB says he's still having a hard time coping with it all.
"I'll never get another hug in my life like the ones he gave," Prescott said of his big brother, Jace. "He was my best friend."
Jace tragically died at 31 years old in April ... but the family hadn't disclosed the cause of death until Dak and his other brother, Tad, sat down for a recent interview with Graham Bensinger.