Regarding Billy (2005)

After Billy's parents are killed he moves home to care for his little brother Johnny, who is mentally challenged. Together the two struggle through the loss of their parents. Meanwhile, Billy's best friend from childhood, Dean, has moved back to town having been injured from the war in Iraq. Over time, Billy's childhood feelings toward Dean resurface, feelings that he fears may end their friendship if discovered. Both men discover hidden secrets that will change their lives forever. These three people must come together to rebuild friendships and family in a time where everything in their world seems unsure. Written by Jeff London

Unfortunately the movie Regarding Billy is not yet available on HBO Max.