Does it seem wrong?

My boyfriend has been going on Omegle lately while being on discord with his friends and girls come on a lot and he says like rude stuff to them as jokes and stuff but idk I don’t feel that happy with him being on Omegle late at night talking to those girls. He knows I didn’t really like it and when I was on FaceTime with him tonight he was on it but he was showing me the people that popped up and one girl was like shaking her ass and I was just done at that point. So I hung up and but then called him back cuz he was asking what’s wrong. And I was just like “idk nothing” cuz he should know why I’m upset cuz I’ve told him before. And when he picked up the phone again he’s like “I’m off my computer now” and hung up on me and wouldn’t answer when I called back. I hate when he’s mad at me but idk is he in the wrong or am I? Idk what to do