I would ask him again to tell someone or ask if you can tell someone. If he says no then tell him that you are going to tell someone because you are concerned for his safety. I'd say that's better than having him be completely caught off guard if/when someone asks him about it. Also, I would save any texts you have to use as proof, or if he has bruises from being choked getting pictures of them.
The right thing to do is to tell an adult
However the way his parents manipulate him sounds like he'll probably get mad at you/not be your friend and he'll probably turn it back on himself and blame himself
Also he could get sent to child services if the physical part is revealed
However in the long run I do believe he'll appreciate you for it
These parents clearly have issues of their own and are using him to vent through them. You intervening could bug him as these parents have a way of manipulating their kids.
Does he have any marks on his neck from the strangling? Or any bruises on his body? That'd be the best evidence to put forward to be taken seriously. I advise you to go with him/wait outside during his counselling session. If he told anyone within the family, it might go back to the parents and land him in even more trouble.
He should probably get an adult involved. Even if the physical contact was a one time incident, it doesn't bode well for that could happen down the line if he happens to upset them again. Regardless though, they don't sound emotionally supportive of him either, which to an extent can be just as damaging as being physical with him. If a school councilor can't help, perhaps he should get involved with his local child protective services.
It's very delicate problem, try to not make it public and talk with ur parents so they can talk with his or smth like that. This is best decision for now, in my mind.
Parents should never choke their children, especially over him waking up at an indifferent time - that's messed up. That's abuse and he should seek help, poor guy.
How is physically assaulting your child not abuse???
idk if it's called something else but my town has this thing called "Mobile Crisis". You call them and they try help the kids best they can and get Social Services involved.
But from what you say it sounds like they are definitely mentally and physically abusing your friend. If you want to help talk to a counselor at ur school and tell them what he's going through and you're worried he might take his own life.
Tell his ass to get it together and go to school on time and stop being lazy. Get good grades so he can get a scholarship and go to a school out of town and not have to worry about his parents or military! #GetOut#TheMovie