I am very glad you wrote. For the first time you are breaking your silence. That is often the first step toward healing. No, you are not right. These were not minor events for a growing child to experience. You didn’t scream at the time for the same reason that lots of other girls (and young boys) don’t object: You were shocked, naive, and helpless to stop it. When someone older and who has some power or authority is the abuser, most kids don’t even know they can object.
My guess is that your current weight is a way you “protect” yourself. There is a part of you that believes that if you are overweight, men won’t be interested in molesting you again.
Please give yourself credit: You do have a core of strength. The fact that you are able to function and appear happy even when you are not says to me that you are now able to take care of that little girl inside. I encourage you to make an appointment with a therapist. A therapist can help you heal from the abuse so that you can go forward in your life.
You are young. You have lots of years ahead to enjoy life, to find someone to love, and to do good work. Please take care of yourself. You are not a burden. You are a person on the brink of becoming all you can be.
I wish you well.