Cousin who sexual assaulted me is getting married

Long story short my cousin who is 5 yeas older than me is engaged and getting married in a years time

When I was 9-11 he did a lot of things to me, and also made me do and watch things. I have never told anyone except the people deeply close to me. But my family doesn’t know. (My family is the type to blame victims especially my mother) and I simply ‘got over’ it and pushed it to the back of my mind. There is already SO much drama in my family. Plus it’s been almost ten years. Is there even a point?

Feelings of resent arises when I heard he was getting married. I feel like his future wife should know. If we were friends I’d genuinely tell her but me her don’t know each other or haven’t spoken. I kinda feels like she doesn’t like me because she would ignore me when I would try to speak/smile at her which I odd. Should I just let it go?

They’re probably say I’m lying to ruin his marriage🤷🏽‍♀️