A controlling person tends to be extremely jealous. He/she will keep asking you about the people you meet and the amount of time you spend with them. He/she will also demand the reasons for spending more time than required with a particular group. In the beginning of the relationship, such people may not show this trait, but as time passes, they will get jealous of your colleagues, or even your best friend. They will dictate to you about the kind of people you are supposed to meet.