Need Advice/need to rant

Okay so my boyfriend and I are going through a weird phase. Last week I had asked him if he would go see Aladdin with me because that was my favorite movie growing up and I of course wanted to see the new version. He told me no Disney movies weren’t his thing. I get it you know a man watching a Disney princess movie. But, his friend who’s a girl, comes over to his house while I was their and was like hey I bought our tickets let’s go. I asked where they were going and he says “it’s her birthday she wanted to see Aladdin so I said I’d go”. Like wth. Am I aloud to be mad about that? Like I’m your girlfriend and have no problem telling me no but say yes to her?

Also, today I had asked where he was and if he wanted to hangout and he said he was busy. I didn’t care you know. And a few hours later I had asked if he wanted to get lunch and he said no I’m taking care of the girl because she has a kidney infection. I wasn’t going to be rude because obviously she’d need someone. So I was like okay forget about it. And he turned it around and made it so I was the bad guy. He was like “ fine next time I do anything I’ll run it by you first” and it was ridiculous. Like are serious. I had surgery and you barely stayed a couple of hours. But you have stayed at her house literally all night. I don’t know what to do or how to talk to him about it.