My boyfriend loves me very much and treats me well, but his mind is immature. He likes to say angry words, even scold me and threaten me. Should I leave him?

If you can be sure that he loves you, then give him time to grow up. Just like hooligans, although they swear constantly, they are also very concerned about the people they like, but some factors lead them not to say sweet words, and swearing does not mean annoying. You can let him change slowly, which is more effective through his family, but if he is difficult to change in the end and you can't accept it, it's better to break up.