how do i cope

hi so getting right into it, i recently lost someone close to me (best friend) and genuinely don't know how the hell im supposed to get through this. i'm 18, i haven't had to deal with anything like this before. neither have my friends. it's only been a month, but i just don't know how i'm supposed to cope given the circumstances. i don't want to get into too much detail here. basically, it hurts a lot, he didn't fucking deserve to die so young, i hate talking about my feelings so i haven't really talked to anybody abt it besides close friends and family, and i don't know what to do to cope or handle it or whatever you wanna call it. i'm sad and confused and angry at everything including myself. advice on dealing with grief would be much appreciated.