My ex is using my cousin to stay close to me, Is that ok?

[Sofia]

I can't say if it is "okay" or not, he's not really hurting anyone. He can be friends with him for whatever reason. But I know exactly what you are talking about! My ex has been trying to stay in my life even after he broke things off. At school, he saw me hanging out with a friend. And now he always talks to her and chills with her during break...and she told me it was weird because they haven't talked in years. I just like to think that guys regret these things, like once they see us girls getting hit on by other guys or just moving on, they get jealous or something