URGENT HELP

Em

ok I really need some help. My boyfriend has ADHD and im 90% he has depression too. He’s going through an extremely tough stage in his life and everything is making him upset and he’s started to self harm. He just ended a face time call with me and I pretended to not be there but he was having a massive argument with his parents and I’m highly concerned he’s going to do something that could hurt him. There is also older people going around the school trying to hurt him because of a past mistake and he told me he’s scared for life by them. I’ve lost words to say to him because I just don’t know how to make him get it off his mind. Should I talk to someone at school and what do I say to him to comfort him?!!!