Jealousy - Conversations With His Ex

Well, I don't know exactly how to start, but now I'm dating a guy I like very much, but there's one problem - talking to my ex ... so when his phone rings and he hangs up in front of me, but he says his ex called. They have recently separated, and my ex and I, and his ex and my ex want to get us back. The difference with me is that I was with him for 2 years, but I don't raise him to let him know that I really don't want to be with him, because obviously the words didn't work. And with him he talks to her, he even celebrates his birthday with her and I wasn't there ... they went for 3-4 months. He complains a lot about her and talks to her. He says that he is annoyed that I look at his phone, Facebook ... not that I looked, but he made an impression on me. I told him I was annoyed by this thing and he said what I was doing and I was annoyed that they were looking for me and I didn't want to fight over nonsense