I am a friend of Bill W too. Like everything we have to do this will take time.
The person who perped you took advantage of you--there really is nothing we can do when a larger person makes us do something we do not want to do.
Tell yourself, what you would tell a 10 yo boy who comes to you and tells you that someone has made him do that. I bet you would be kind and loving.
We need to be willing to go to any llengths to get rid of guilt for sexual acting out that we did because of being sexualized at a very impressionable age.
Take it easy.
If we do not live what we believe, then we will begin to believe what we live.