Behind the scenes, diplomatic noises are talking about a peace deal. Earlier on in the year, Biden showed some irritation at Ukrainian maximalism and indeed Ukrainians have said they will fight on whether or not they get aid
Ukraine would be foolish to continue the war if US stopped or reduced support.
Russia has the raw materials and the factories to re arm and have another go.,... indeed they have the means to manufacture older missiles & artillery forever more.... Ukraine isn't destroying Russian factories and cities etc...
imho - Ukraine would be wise to give up ambitions on Crimea and to lose territory in the East... in return for a demilitarised zone in Russia and Ukraine, security guarantees from NATO and a concerted effort to get Ukraine re armed with Western weapons and air defence.
Neither can "win" atm so unless they both compromise, the war goes on for years and Ukraine, not Russia, will eventually be destroyed.