My cousin didn't invite me to her wedding. Do i invite her to mine?

Hello, I'm looking for some advice please. My cousin ( the bride ) got married years ago and didn't invite any cousins to her wedding. It was aunts and uncles only. None of the aunts and uncles attended because their children weren't invited. It caused a lot of arguments in the family as the cousins weren't children. It later transpired that a lot ( double figures ) of the grooms friends and their plus 1's had attended so it wasn't a case of limited numbers, there were only 5 cousins.


I am getting married next year and really do not want to invite her because I wasn't important enough for her to invite me. My fiancée is best friends with my cousin ( the brides brother ) and I want to invite 2 other cousins and their partners to my wedding as they invited me but that means leaving out 3 cousins.
It's causing me so much stress. I really don't know what to do.
Any advice is greatly appreciated.
Thank you.