My boyfriend...

So I’m just not the type to get jealous. I really don’t do it, I’m too lazy to care in all honesty.

However,

I was at my boyfriend’s house at the weekend, and his cousin came up (she and I are really close) and when she came up to visit a girl who my boyfriend is good friends with was snapping him. It was a constant notification, I just assumed it was like an important conversation or whatever.

My boyfriend’s cousin though was making the “lol are you jealous jokes” and I’d laugh it off because like it is a joke.

Now I swear. I can’t make it anymore known, but I am not a jealous person like that.

But, we were sitting in the family room and there was other family members of his over. And I never usually look at him on his phone but this particular time I did. And he was snapping this girl that’s his mate. He took a picture of himself, posed for it or whatever. But then he deleted it, fixed himself for it and then retook a picture to send to her.

I swear I was a bull but said nothing because it isn’t me. But it still annoyed me. Then I was informed by him; we were just chatting that this friend did anal and she didn’t mind it. And each to their own but I don’t like anal I don’t approve of it, I believe that hole was made for things to only exit and not enter. So I immediately said “ew disgusting, I didn’t think she’s like that - I don’t know how to feel about that” it’s a natural feeling for anyone who hates the thought of anal. But he got so annoyed and was saying not to talk about her like that and how she’s a good friend of his or whatever. And told me off.

Am I wrong in being jealous or what?