Putin has stated that Russia will immediately cease all operations IF Ukraine agrees to their terms.
1) Ukraine should cease all military actions
2) Change constitution to enshrine neutrality
3) Acknowledge Crimea as Russian territory
4) Recognize Luhansk and Donetsk (Donbas) as independent states
Honestly these terms are not even too harsh considering the situation on the ground. Notice that these terms are infact more demanding than the Minsk agreements however Ukraine was never willing to accept those terms, to allow the Donbas to be autonomous, and relentlessly shelled the Donbas, killing 14,000 people, mostly ethnic Russians.
Putin has stated that if the government in Kiev continue on the current path, that likely Ukraine will cease to exist. If I were the Ukrainians I would accept the terms now. Otherwise Russia will likely want more territorial gains after the war is over and they've made so many sacrifices in blood and treasure. Likely Russia will look to annex all the territory from Transnistria, who are extremely pro Russian, to the Donbas, including all of Ukraines coastal territory in the south.
Mariupol is currently surrounded and civilians are being evacuated. Afterwards Russia will annihilate anything that moves and they will storm the city by air (paratroopers), land and sea (amphibious landing by marines).
After Mariupol the rest of the dominos will fall one by one, including Kharkiv, which is the second largest city and the industrial heart of Ukraine. By then Kiev will be surrounded and it will only be a matter of time.
Sometimes in life you have to cut your losses and honestly, I don't think that the Ukrainians can win this war.