
because you feel so bad about it having happened to you (which is totally understandable, it's obviously a horrible experience) that you think other people would have the same negative emotions towards you that you feel towards yourself if they find out. it kind of makes sense from your perspective and it can be really hard to separate your point of view from how others see you. you're not damaged or made worse because someone did something horrible to you, that evil is in them, not you.