I remember seeing this when I was a kid in the early 80s. Pretty sure it was from the 60s. I remember it being in colour. Two young boys, one blonde, one dark haired (I think he was Mexican). Grew up together like brothers, grew old together. One plot point I remember is that the Mexican boy’s little sister was kidnapped by Indians. When they were adults, he finally found her. She was still living with the tribe, and happily married.
“Little Big Man” (1970)?
Well, no blonde haired boy and Dustin Hoffman plays an American kid, not Mexican, so probably not it.
I know that movie. Not the one I’m looking for, cuz in Little Big Man, he’s the one raised by Indians, and in the movie I saw, it was his sister. I remember he meets up with her several years later in her “wigwam”, and she’s telling him how happy she is.