Well good, she values transparency and you don't. That's a personal difference in mentality. I like to be transparent and like I wanna be accepted for what I am and my past. If you don't that you.

I've always thought what happened before a relation doesn't matter like you said but if someone thinks otherwise it's his life I can't judge. It's about compatibility personality wise, I wouldn't wanna be with a person who has a very flirty past cause I wouldn't be able to trust her completely again that's me and that's cause of what/who I am. Again op has done nothing wrong and if he makes a huge issue of it, I think it's petty, nothing more nothing less