What concerns me about this post is that you said you lied because you wanted sympathy.
I'm not sure. If it's something you feel really bad about then, by all means, tell him. Explain that you were actually a lot younger than eight when it happened but that it did still happen and you need his support and care, y'know? I don't know how he'll react but I don't imagine he'd be too mad. It did happen, just at a different time than you've implied.
Tell him the truth.
yeah, tell him the truth
u lied about being raped? or you lied when you said it was at 8 years old?
for some reason, i told him i was eight.
Tell him, why not? Its not going to change the circumstances.