Sexual Assault

My older cousins assaulted me when I was 7 till 14, one of them only tried it once, and now he is getting married. I've never told anyone about it, but now ever since i heard about the wedding i feel like I did something wrong not telling anybody, I'm letting a girl make the biggest decision of her life with a person like this, I feel like I'm letting her down, I've never met or don't even know her name but if i was in her place i would want someone to tell me. She'll be spending rest of her life with someone who molested his younger cousin who had no idea what is he doing with her at that time. Everyone except me to attend cause I'm the only girl in the family, but i can't bring myself to attend it. I can't see all this happening, i can't see him moving on having perfect life when he, when they all ruined mine, and made me senile, that i constantly loose my mind. I know it's selfish i want them to be happy but I don't want to see it with my own eyes. I want to hate them but i still don't, i hate them for ruining our relationship from what it could've been.