It's only been half a month since the divorce, and my ex-husband always looks at my circle of friends and asks me questions?

Is your ex-husband jealous? She seems jealous of you. You are happier than her. He is not as good as you, nor as happy as you, which makes him lose face in front of his friends, so I warn you not to wander around in front of his friends. If a jealous person is afraid that you are better off than him, I wonder if he is such a person.