Thank you for your support. He started to use his tranquilizer these days and I didn’t know he took 2 pills today for example. He was first against it, I guess it made him feel even sicker to need them. But then he started to take when he gets weird mood swings, I’ve never seen him angrier by the way. He is also doesn’t think the psychiatrist understands him or cares him enough which is probably true. He thinks that “The doctor and the antidepressants would not make me gain/earn myself, it can only reintegrate me into society.”
(I’ve translated the full sentence he said, that’s why ‘make me gain/earn’ part seems awkward. He meant something like being normal again, loving oneself again, having hope again.)

He slowly started to not answer his parents’ phone calls sometimes, I decided for now it’s not my job to say anything to him, his sister has met me so if they feel worried, they can ask me as well, other than that I think it’s better for me to stay outside of this. I’ll search for ways to make us feel better again. We just need some hope in our lives, especially him.