AITA for not inviting my brother to my wedding?

We are not close. He is the golden child, I am the black sheep. He was the popular kid who got all the girls, I had my nose in books. I went to college, he didn’t. <br><br>He texted me to see how my wedding plans were going earlier this week to ask if I had found a caterer and wanted recommendations. I politely thanked him but said I was going to the cheaper route of hit or miss, and I was preoccupied with finding a dress. He said I should save myself the trouble and said my SIL would loan me one of hers. I politely declined, though I did thank him for the offer. He said I should at least invite her. I laughed and said I didn’t think she’d be interested. He said she has always had a soft spot for me. I said that it would be awkward and I’d see what my other siblings said. He got upset and said I was being hard headed, that I wasn’t giving her a chance, but I said it was final and I wasn’t going to change my mind. <br><br>He didn’t text back for a few days, but today he sent me a screenshot of our mom’s text asking if I had decided on the cake yet and if I’d be interested in borrowing my SIL’s dress. I said I was thinking of a cookie cake, and explained that I wasn’t a dress girl. 10 minutes later my brother called me, saying that my mom was upset over me excluding him. I explained I was just making it a small wedding and only inviting close family, which is why he wasn’t on the list. He got angry and said I can’t exclude him because we share parents. I said it’s not like we’re close and I didn’t want to make him travel. He said I couldn’t leave him out and expect him to get over it. I asked him if he wanted to come, and he said of course. I said I’d be inviting him and my SIL.