Is OTHER wrong in the post ? POST : Backstory: I saw my brother cry for the first time not over death when I left for college in 2013. He has been in drugs and such since then but I think he has his life straighter at this point. Ever since I left he has a hatred towards me because I would side with my mom (single parent of 3 boys) and show her respect.

&amp;#x200B;

Fast forward to last month: I asked him to be part of my wedding this coming April (Groomsman). He said he would when I first proposed to my girlfriend in June 2018. Now we picked a wedding date not on his birthday because he threw a fit about it. So we picked out the following Friday, which turns out to be his girlfriend's 21st birthday. I said sorry but that's the date we picked and saved up to 8k when booking at this venue. So he is all mad about it. I told him if he wants to make a big deal about it great she doesn't have to come. And now he is not coming cause supposedly I don't want his girlfriend there.

AITA for wanting to cut ties with him if he doesn't come to my wedding over a birthday party?