Do We Have a Nuclear War With Russia?

According to Russia, Ukraine is now occupying Russian territories. So according to this logic, the West should ask Zelensky to retreat from these territories that Ukraine defact the controls,. Of course, this will never happen. There is a common understanding that the West cannot lose in this war because it will have dramatic consequences for many countries outside of Ukraine and Russia. It doesn't mean that NATO is in a state of war with Russia. It only means that NATO is supporting Ukraine. And I think this is a major idea here, is that when you try to present an argument, so let's come, let's come the aggressor because we don't want any kind of escalation.