I have the urge to not change my wedding procession order. This will result in my best friend walking with her ex.
Are you angry with your best friend?
She keeps betraying me, so I want to make them walk together so she's uncomfortable.
She sounds annoying. It is a wedding though, and it's rude to make your best friend with someone she isn't comfortable around for your procession.
They're just going to walk together. It's not that big of a deal.
I know it's your wedding and you think it's not that big of a deal. But this could really upset her and cause issues in your own wedding. I would recommend making the switch that way everyone will be happy in the end.