My boyfriend has a sister, Shanna, who can't handle any bad news or people saying no because she has a learning disability, so Shanna gets everything she wants.

I have two other friends who birthday is close to mine and we are doing a yacht with a dj. we all work in hospitality so we was able to snag a good deal for a weekday party.

I told his mother of the birthday plans after she asked and told me Shanna would have so much fun. She went off to tell Shanna. Shanna was not invited. I don't want to have to worry about her at my party. I don’t want to babysit, I don’t want my boyfriend to babysit. I want to have fun. I told my boyfriend to set this straight now. He said he would sort this out later, but I have played this game before with him, and Shanna ended up coming anyway because of his mom and her guilt him.

I got mad and said told him loud enough for both his mom and Shanna to hear, saying Shanna isn't coming, and neither can you if you can't grow some balls. Shanna started crying and his mom yelled at me for upsetting her daughter.

I told them "fuck this and this isn't going to be my life" and walked out his mom house and ordered a UBER home. Last I heared I upset Shanna so much she had to go the hospital with a panic attack and obviously we are no longer together. My mom said I should have been nicer to his sister since she has a disability but I feel like he should have stepped up right then.