What are the manifestations of men's jealousy?

First of all, he will be calm, but he will not be so enthusiastic about me. When you don't talk to him, you may not really find him jealous. When you talk to him, he is no different from usual. However, when you need his help, he is not so enthusiastic. For example, if you ask him to do something for you, he says he will do it for you. However, because he was jealous, he didn't act at all.

Secondly, when I say that a boy is not bad. He will say that that boy is not good, and if I continue to praise that boy, he will be reluctant to talk to me again. If I don't praise that boy, he will judge me from his own point of view, or give me a sermon. It sounds good on the surface, but it is also an objective evaluation to say that he is. In fact, his jealousy has turned over. In fact, when I say hello to other boys, he will ask if he has had more contact with that boy. If I say good relations, then he should be jealous of others again.