Is OTHER wrong in the post ? POST : Throwaway account. TL;DR at the beginning. Will put spoiler tags.

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TL;DR: &gt;!My whole family is mad at me for yelling at my cousin after she tried to take over my wedding. I also said my fiancé, whom she is in love with, would never love her. No one is letting me see her and apologize. AITA?!&lt;

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To make this easier to follow, my fiancé will be Jay, and my cousin will be Lisa.

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My fiancé Jay (M24) and I (F24) have been together for 10 years. We have never doubted the other in our relationship ever. We have a great relationship. Lisa (F21) and I have an okay relationship. We did grow up together, but we just never clicked. 

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Now this happened when she was a senior in high school and Jay and I were 21. I went home for the holidays with Jay to celebrate Christmas with my family. During dinner, I overheard Lisa telling another cousin of ours that she wanted to fuck Jay. I confronted her later, but she said it was a joke. Last year at another Christmas gathering I went to with Jay, she told my aunt she was in love with Jay. I felt bad for her, so I didn't confront her this time. That night, Jay proposed. I saw Lisa crying and running upstairs to the bathroom.

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Flash forward to now. Our parents, Jay and I are planning our wedding. I specifically told my family that it was only going to be us 6 planning the wedding, no one else. My aunt argued with me to let Lisa on the planning committee since Lisa wants to be a wedding planner in the future. I eventually agreed.

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I really regret letting her on the committee. Let me list the things she's done so far:

* Wanted to take control of the catering. All the food choices, cake, table covers, napkins, utensils, etc.
* Wanted to pick out my dress. I said no to her pick, then the started to pout.
* Wanted to pick out the bridesmaid dresses. She said she wanted this specific dress because it looked good on her. She's not even one of my bridesmaids. 
* Wanted to have a big wedding. I said no since both Jay and I wanted an intimate wedding with only family and close friends.

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Last week we were having another family gathering, and Lisa would not stop gushing about how perfect the wedding was going to be. Then she listed everything Jay and I picked out saying it was all HER idea. The more lies that came out of her mouth, I got angrier.

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I snapped and started to yell at her. I said how it wasn't her wedding, it was mine, and I could plan it however I pleased. I also said how he loved me and he would never love her. She burst into tears and ran upstairs to cry. I realized how hurtful the things I said was and went to go apologize, but my family stopped me. They told me I should just let her plan the wedding and let Jay go talk to her. I honestly felt really bad and tried to apologize, but no one would let me. Even Jay thinks I took it too far.

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Reddit, AITA?