AITA for not inviting my cousin’s ex to my wedding where my cousin (my maid of honor) will be in attendance?

I (28F) am getting married in a few months. My maid of honor is my cousin (27F), let’s call her Pam. She has been like a sister to me since childhood. <br><br>Pam married young (22) and got divorced a year later. She has blocked her ex on all social media and doesn’t talk to him anymore, it ended badly. He’s also from our town so it was a family scandal. <br><br>I have known Jamie (25M), her ex-husband, for years. We are also on some of the same social media platforms, though I have not seen him in person since their divorce. <br><br>He messaged me two days ago saying he was happy for me, and then said he wanted to go to my wedding as I were like family to him. I told him I appreciated it, but I didn’t think it was a good idea considering 1. him and my cousin’s past and 2. her being my maid of honor. <br><br>Jamie argued that he was once part of the family and still loved my cousin, and that he didn’t want to have hard feelings with our family and me. The conversation didn’t go very far and he eventually got upset and said I should have been more loyal to him and our friendship. <br><br>I told my fiancé and he also thinks that inviting my cousin’s ex is a bad idea. I also told my cousin about the message and she cried and thanked me for not inviting him. <br><br>I feel so bad and I think I might be the asshole. I don’t want to hurt Jamie, of course, but I also don’t want to ruin my relationship with my cousin. Jamie is right, he is family (or at least he was), and I’ve known him for years. But I also can’t let my cousin go through something so uncomfortable and bad on my big day. <br><br>Edit: I raised my cousin after her parent’s divorce and raised her when my aunt was working. Like I said, she’s like a little sister to me. <br><br>Also, I apologize for all the mistakes, English is my second language. Please be patient with me