The presence of the US in Europe has always been the problem.   Russia hates the US meddling and trying to finish the “Cold War”.

The Europeans need to exclude the US and convince Russia that they are ready for a non-US dominated relationship with Russia.  

Without the US, Europe is no threat to Russia.    Europe dont have the US luxury of starting a war from far away.

Russia is not going to try to invade Europe anytime soon - it has a smaller GDP than Italy and a shrinking population.

Russia wants to sell lots of commodities to Europe and it may be prepared to give security guarantees to Ukraine if the US is not trying to turn Ukraine into another US missile base next to Russia.