There are a lot of issues that you are dealing with at once: being biracial, discrimination, sexual abuse, and actually being blamed for that abuse.
It must have taken a ton of courage to get this far and to post about it. I believe that nothing but good can come from bringing this up in this type of safe forum.
Do you think there is any way you could separate these injustices, even a tiny bit, to try and not have to deal with them all at once? Only you can answer that. Do you think you could find someone you could speak with to help you work through these horrors? It may not be easy to find the right person, but I believe it would be worth the effort.
However you proceed, please don't forget that there is no one more deserving of your love, patience, kindness, and grace than you! All too often we are able to freely offer these to others, but withhold them from ourselves. Please be kind to yourself.
Do whatever (that is not harmful) that you need to do! Screw what others think or say.
You are important, special, and worthy of being loved just the way you are right this very moment: scabs & scars and all!
I am deeply saddened to read your post, yet glad that I didn't miss it. I hope to see you continue to post.