My girlfriend and I have been dating for three years now. We have broken up maybe two times. And during those times I went on without seeing her for a month, and the next one 2 weeks.

I asked her to come with me and do it together. However, she refuses because she says I don't trust her. That if I trusted her I wouldn't need proof she was clean. This doesn't make sense to me because it's not about trust. It's about us being sure that we are both clean.

I have had previous sexual relationships before I met her. She said she was a virgin when we first met. I believe her. But that doesn't mean we shouldn't get tested in my opinion.

Is it justified that she shouldn't have to get tested out of trust? Or should I be worried something else might be going on behind the scenes?