Relationship

So I have a boyfriend and we have been together for 1 year and 5 months, now we haven’t been on the best of terms. He has been snapping with a girl and he doesn’t tell me what they talk about and when I told him to stop he gets all defensive and still talks to her. He says she’s just a friend but I heard that before and knew it wasn’t. Now since it’s our anniversary, he said he was gonna post me and I felt good until I saw that she was blocked from seeing his story. What should I do? Please help🤧