<human>: Provide a brief overview of the text.

We have never had sex, but both of us want to do it. 

In the first couple of years of our relationship, she had some trust issues, she didn't want to become much physical with me, because she didn't know if I 'was the one'. You know, that stuff. And I respected that, because I loved her. But... 

It's been 3 years since we start dating. She says that she fully trusts me, wants to be with me, and I believe her, of course. But sometimes, when we get more physical, I sense that somethings wrong. When I ask her, she says that she's thinking about how she used to feel, and that she is afraid that she may feel that again. That the more she thinks about it, the more nervous she feels and isn't enjoying being with me.

We've tried everything. I keep telling her that we love each other, and that's all that mathers. That conversation usually ends with her saying something like "I love you and I will do my best so this doesn't happen again." But it happens, one day or one month later. It always does. 

I don't know what to do. I don't think it is normal for two people like us to be worried about this kind of thing. We should be happy with our sexual life, just as we are about the other aspects of our relationship.

Any help would be nice, sorry about my english.
<bot>: She thinks about what she used to think, and that makes her nervous, so she thinks more about that, and so on.