relationship advice

M25 here, today i got dignosed with major depressive disorder with psychotic features today and idk if i should tell my boyfriend about it because i don't want it to put a strain on our relationship. i also don't want to tell him because i don't want him to be scared when he hears the "psychotic" part and be scared i'd hurt him or do anything to put him in danger. we started dating 4 years ago and i love him soooo much but idk how he'll react and i don't want him to break up with me because he's scared for his safety. plsss help