Need some advice

Ok well, I was raped at 11 years old, I'm 16 almost 17 now and not really many people know about it. My dad has no clue about it because when I was younger I found it difficult to tell him. About a year ago I finally came out and told me mom. She really didn't say much about it. A couple of my friends know about it, but they don't think it's true so they just ignore the fact. I told my boyfriend also, he knows the guy that did it and he wants to beat him up for it. But I really don't think he should considering it happened about 6 years ago. The guy that done this to me was 13 at the time and hes almost 19 now. My boyfriend wants to hurt him pretty bad considering what he had done to me was wrong. I don't want my boyfriend to get hurt or even put in jail for fighting someone. I really regret not telling my parents when it happeded. But I was scared at the time it happened. He has threatend my life if I told anyone.

How can I stop my boyfriend from taking charge?
Do you think I should tell my dad what happened, since it was 6 years ago?
I haven't really talked much about this problem to anyone, but it has been bothering me a while. It's even hard for me to discuss this issue with my boyfriend, but I try. Please can you help me on my decision? thankyou for your time
Kasie