The Butcher Boy (film)
From BoyWiki
The Butcher Boy (1997) is a film based on the Patrick McCabe novel of the same name. Set in Ireland in the early 1960s, it portrays the life of the young teen Francie (Eammon Owens), who lives with his drunken father and obsessive/depressive mother.
He has difficulty controlling himself, largely due to the instability in his home. He eventually finds himself very alone in the world, causing him insanity. He takes extreme measures against those who he believes harmed him, but later regrets.
The story is narrated by Francie as an adult, much like Stand By Me was.