Try just writing down everything you feel, it might help to get the thoughts out somewhere, and maybe you could share it with someone you trust if you feel comfortable.
Not sure I can really help much with advice 😕 where I live seems pretty shit for that sorta thing (probably why I know a few people who have done suicide). We didn’t have anything like school councillors (till I read online about it didn’t know it was a thing) and usually get told “cheer up” or “deal with it” if you tell someone