We have the business of mutual self destruction though, let's not forget.
We - the Europeans- have to stand strong here, because if Trump lets Putin claim the land he has gained in this horrible war, he or his successor will not stop there. Other posters have mentioned Russia needs time to regroup, and this appeasement by Trump will allow him that.
The Ukraine may not be in the EU yet, but Bulgaria, the Czech Republic, Croatia, Estonia, Hungary, Latvia, Lithuania, Poland, Romania, Slovakia and Slovenia are, of these Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia and Slovenia are members of NATO, as are we.
So at some point in the future, when Russia is stronger again, there is no knowing where this could end.
That's why Ukraine and all of Europe need to be included in any talks about the end of this war.