So why did god create us and the universe in such away that we desire what we are not supposto do? God knows all and controls all, so he did this on purpose so why?

Why did he choose to torment his greatest achievement?
Those questions have been beat to death, and someone who has their minds set on that being the way it is, is never going to say 'yeah, that's not exactly rational, is it?"

But to understand those questions, you have to understand the times, the purpose of religion as an early form of Government and crowd control, etc.

If you go from the assumption that it is all literal, you'll never see a rational answer to them. But if you go from the perspective that these are the things that the culture who came up with this stuff was trying to accomplish, suddenly it all starts clicking into place.

Oh, and expect a lot of hostility from the buddies g/f if you confront her on her beliefs. It's human nature.