I could see a peace treaty. Donetsk and Luhansk will be part of Russia in exchange for a cease fire. Plus Crimea. Ukraine will ask for Polish peacekeepers.
In that scenario, my advice to Ukraine is to build nuclear weapons and aim them at St. Petersburg and Moscow. Otherwise Russia will just rearm and attack them a couple years later.
The Russians hate Poles. Won’t work.
And Ukraine does not believe Russia won’t return in 8 years for more land